Home | Community | Message Board


This site includes paid links. Please support our sponsors.


Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!

Shop: Left Coast Kratom Buy Kratom Extract   PhytoExtractum Buy Bali Kratom Powder   North Spore Bulk Substrate   Original Sensible Seeds Bulk Cannabis Seeds   OlympusMyco.com No Unicorns Here—Just Quality Bags That Work   Mushroom-Hut Substrate Bags   Kraken Kratom Red Vein Kratom   Myyco.com Isolated Cubensis Liquid Culture For Sale   MagicBag.co Certified Organic All-In-One Grow Bags

Jump to first unread post Pages: < Back | 1 | 2 | 3 | 4 | 5 | Next >  [ show all ]
Some of these posts are very old and might contain outdated information. You may wish to search for newer posts instead.
Offlinedisassembler
Stranger
Male

Registered: 01/14/16
Posts: 32
Loc: Ukraine Flag
Last seen: 5 years, 1 month
Re: Themodynamic Analysis of Monotub Air Currents (moved) [Re: TravelAgency]
    #22964752 - 03/02/16 08:52 AM (8 years, 10 months ago)

What about monotube without CO2? If you pour just some warm water in it, it will also "work" over some time, after water cools down. You'll be able to see downward dry traces from upper holes. Why? Why air density in monotube without CO2 is higher than ambient? Or it's not? What's the physics without CO2 and warm substrate?

Extras: Filter Print Post Top
OfflineGreenRabbit
Plutonium Pollinator
Male


Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 3 years, 3 months
Re: Themodynamic Analysis of Monotub Air Currents (moved) [Re: disassembler]
    #22965212 - 03/02/16 11:30 AM (8 years, 10 months ago)

Quote:

disassembler said:
What about monotube without CO2?



That isn't possible, unless you have an O2 as your air supply, and nobody does that.

Quote:

disassembler said:
If you pour just some warm water in it, it will also "work" over some time, after water cools down. You'll be able to see downward dry traces from upper holes.



I'm not sure what you are talking about, and I see no reason why you would add warm  water.

Quote:

disassembler said:
Why? Why air density in monotube without CO2 is higher than ambient? Or it's not?



It's not. CO2 is more dense, if you fan less or have low airflow, CO2 concentrations will increase, density will increase, and you have a higher chance of airflow reversing.

Quote:

disassembler said:
What's the physics without CO2 and warm substrate?



Without CO2 makes no sense... The substrate is already warm, if you mean without a warm substrate, that would only happen if your substrate is dead and no longer producing heat.

Extras: Filter Print Post Top
Offlinedisassembler
Stranger
Male

Registered: 01/14/16
Posts: 32
Loc: Ukraine Flag
Last seen: 5 years, 1 month
Re: Themodynamic Analysis of Monotub Air Currents (moved) [Re: GreenRabbit]
    #22968044 - 03/03/16 01:04 AM (8 years, 10 months ago)

Sorry for my bad English.

Quote:

GreenRabbit said:
Quote:

disassembler said:
If you pour just some warm water in it, it will also "work" over some time, after water cools down. You'll be able to see downward dry traces from upper holes.



I'm not sure what you are talking about, and I see no reason why you would add warm  water.




To check if monotube works. And yes, it works. Even without CO2 and substrate. There are downward air streams in monotube. And I don't understand why they are.

Edited by disassembler (03/03/16 01:05 AM)

Extras: Filter Print Post Top
OfflineKizzle
Misanthrope
 User Gallery

Registered: 08/30/11
Posts: 9,870
Last seen: 2 months, 8 days
Trusted Cultivator
Re: Themodynamic Analysis of Monotub Air Currents (moved) [Re: disassembler]
    #22968382 - 03/03/16 05:47 AM (8 years, 10 months ago)

Quote:

disassembler said:
Sorry for my bad English.

Quote:

GreenRabbit said:
Quote:

disassembler said:
If you pour just some warm water in it, it will also "work" over some time, after water cools down. You'll be able to see downward dry traces from upper holes.



I'm not sure what you are talking about, and I see no reason why you would add warm  water.




To check if monotube works. And yes, it works. Even without CO2 and substrate. There are downward air streams in monotube. And I don't understand why they are.



You can expect updrafts in the center due to heat from the substrate and downdrafts on the sides of the tub do to cooling effect of the plastic. With adequate holes though it's mainly an updraft on the inside. You can get a good idea of how the currents are moving if your mushrooms start sporulating. Where there's an updraft you'll see spores landing on the cap of the mushroom dropping them.


--------------------

Extras: Filter Print Post Top
Invisiblemaddchef
Vaginal escape artist
 User Gallery


Registered: 09/04/09
Posts: 5,602
Loc: Your mom's vag
Re: Themodynamic Analysis of Monotub Air Currents (moved) [Re: Kizzle]
    #22968651 - 03/03/16 08:39 AM (8 years, 10 months ago)

Thank you Kizzle. I always fucking argued with Frank about this. Don't get me wrong, Frank could grow circles around me, but when we came to discussing that humid air rises up even though it's heavier he just wouldn't listen lol


--------------------
In the land of the blind, the one eyed man is king.

All mushrooms are edible, but some only once.....                     

                                        Easier than cakes

I do science and shit.

:havesomescience:

Extras: Filter Print Post Top
OfflineGreenRabbit
Plutonium Pollinator
Male


Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 3 years, 3 months
Re: Themodynamic Analysis of Monotub Air Currents (moved) [Re: maddchef]
    #22969012 - 03/03/16 10:55 AM (8 years, 10 months ago)

Quote:

disassembler said:
Sorry for my bad English.

Quote:

GreenRabbit said:
Quote:

disassembler said:
If you pour just some warm water in it, it will also "work" over some time, after water cools down. You'll be able to see downward dry traces from upper holes.



I'm not sure what you are talking about, and I see no reason why you would add warm  water.




To check if monotube works. And yes, it works. Even without CO2 and substrate. There are downward air streams in monotube. And I don't understand why they are.




Oh you meant without CO2 from the substrate. How do you know there are downward air streams if there is nothing in there?
As long as there is a difference in pressure caused by either humidity, temperature, or CO2 increase there will, be some airflow.

Quote:

Kizzle said:
You can expect updrafts in the center due to heat from the substrate and downdrafts on the sides of the tub do to cooling effect of the plastic. With adequate holes though it's mainly an updraft on the inside. You can get a good idea of how the currents are moving if your mushrooms start sporulating. Where there's an updraft you'll see spores landing on the cap of the mushroom dropping them.




What you are describing is a convection current, and I don't believe they exist in a monotub. I don't think air is circling around like you say.
I think the updrafts are caused by air leaving the tub and air being pulled in the bottom holes.
I've been looking for photos of grows with good tracks from spore deposits and I've found many with mushrooms in the corners with spores on them, suggesting a updraft throughout the whole tub, not just in the center.

Quote:

maddchef said:
Thank you Kizzle. I always fucking argued with Frank about this. Don't get me wrong, Frank could grow circles around me, but when we came to discussing that humid air rises up even though it's heavier he just wouldn't listen lol




That's because you are wrong. Humid air is lighter than dry air. Read the OP....

Edited by GreenRabbit (03/03/16 10:56 AM)

Extras: Filter Print Post Top
InvisibleSpitballJedi
Ancient Astronaut
Male User Gallery


Registered: 10/13/12
Posts: 8,598
Loc: Nibiru Flag
Trusted Cultivator
Re: Themodynamic Analysis of Monotub Air Currents [Re: GreenRabbit]
    #22969093 - 03/03/16 11:18 AM (8 years, 10 months ago)

Quote:

GreenRabbit said:
If the bottom holes are stuffed tight, there should be no air going in through the bottom holes. If the top holes are stuffed very loosely, then yes, air will travel in both directions.




Some air does come in through the tightly stuffed bottom holes. That's why you get a dry ring. But, most of the air exchange is through the top. As the air flows out the top, somewhat of a vacuum is created that pulls dry air in the bottom. The higher the flow rate, the bigger the dry ring gets. Because the bottom holes are close to the substrate, slowing the flow coming in helps prevent the substrate surface from drying out.


Quote:

GreenRabbit said:
Now, if the top holes are stuffed loosely, but still enough to stem free air travel, then the air would actually be sucked in the top holes as air is pulled out the bottom by gravity.




There's no stuffing scenario that will cause air to be sucked in to the top. Air coming in the top is because of natural currents and drafts in the room. The only way to get air to suck in through the top holes is to attach a device that sucks or pushes air out the bottom that causes enough vacuum to reverse the natural rise of heat and water vapor. If the holes on top are loose and the bottom is tight, a fan in the room pushes more air through the top than normal, but the tub is not sucking in, the air is being pushed in and most of it will still flow right back out the top top because that would still be the path of least resistance for the added internal pressure caused by the fan.


Quote:

GreenRabbit said:This is why monotubs can be on the ground, and SGFCs need to be raised. And SGFC works in a totally different way, so air flows upwards instead.




Monos can be on the ground because there are no holes on the very bottom. The laws of fluid and aerodynamics don't change between a mono and SGFC. Air in both naturally flows upwards. If you block the bottom of a SGFC, the flow slows just like stuffing the bottom holes of a mono. The principles of both are essentially the same. Bulk substrate in a mono just provides enough evaporation and heat to create the flow need for adequate FAE on its own and a SGFC needs help from perlite. The difference in design is essentially due to using bulk substrate vs wet perlite and their abilities to create flow.

Quote:

GreenRabbit said:Hot humid air rises, sure, but the air in the tub isn't the same chemical composition as the incoming air. It mixes and on average is more dense than the ambient air. Refer to Air Density Calculation for densities of different compositions of air.




The difference in chemical make up is not enough to counter the forces created by heat and water vapor's natural inclination to rise. Yes, CO2 is more dense than the air we breath, but the tiniest amount of turbulence will mix it with the surrounding air and the amount that is produced in a mono is not enough to counter the rise of heat and water vapor. All the chemicals created get mixed in with the warm humid air and is carried out the top. Math doesn't tell the whole story when it leaves out too many variables.

I didn't read the entire OP, but it looks pretty in depth.


--------------------
The Basics
A little civility goes a long way

The Noob Forum
The Hammock Hangers' Forum

Extras: Filter Print Post Top
OfflineGreenRabbit
Plutonium Pollinator
Male


Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 3 years, 3 months
Re: Themodynamic Analysis of Monotub Air Currents [Re: SpitballJedi]
    #22969137 - 03/03/16 11:29 AM (8 years, 10 months ago)

Quote:

SpitballJedi said:
Some air does come in through the tightly stuffed bottom holes. That's why you get a dry ring. But, most of the air exchange is through the top. As the air flows out the top, somewhat of a vacuum is created that pulls dry air in the bottom. The higher the flow rate, the bigger the dry ring gets. Because the bottom holes are close to the substrate, slowing the flow coming in helps prevent the substrate surface from drying out.




The same amount of air overall is going in the bottom holes as it is going out the top holes. Due to the larger size of the bottom holes, the air will flow through them slower.

Quote:

GreenRabbit said:
Now, if the top holes are stuffed loosely, but still enough to stem free air travel, then the air would actually be sucked in the top holes as air is pulled out the bottom by gravity.




Quote:

SpitballJedi said:
There's no stuffing scenario that will cause air to be sucked in to the top. Air coming in the top is because of natural currents and drafts in the room. The only way to get air to suck in through the top holes is to attach a device that sucks or pushes air out the bottom that causes enough vacuum to reverse the natural rise of heat and water vapor. If the holes on top are loose and the bottom is tight, a fan in the room pushes more air through the top than normal, but the tub is not sucking in, the air is being pushed in and most of it will still flow right back out the top top because that would still be the path of least resistance for the added internal pressure caused by the fan.




Yea, I should edit the OP. Air flow can reverse but it has nothing to do with stuffing. It will reverse if the sub dries out and humidity drops.

Quote:

GreenRabbit said:This is why monotubs can be on the ground, and SGFCs need to be raised. And SGFC works in a totally different way, so air flows upwards instead.




Quote:

SpitballJedi said:
Monos can be on the ground because there are no holes on the very bottom. The laws of fluid and aerodynamics don't change between a mono and SGFC. Air in both naturally flows upwards. If you block the bottom of a SGFC, the flow slows just like stuffing the bottom holes of a mono. The principles of both are essentially the same. Bulk substrate in a mono just provides enough evaporation and heat to create the flow need for adequate FAE on its own and a SGFC needs help from perlite. The difference in design is essentially due to using bulk substrate vs wet perlite and their abilities to create flow.




Another edit to be made..

Quote:

GreenRabbit said:Hot humid air rises, sure, but the air in the tub isn't the same chemical composition as the incoming air. It mixes and on average is more dense than the ambient air. Refer to Air Density Calculation for densities of different compositions of air.




Quote:

SpitballJedi said:
The difference in chemical make up is not enough to counter the forces created by heat and water vapor's natural inclination to rise. Yes, CO2 is more dense than the air we breath, but the tiniest amount of turbulence will mix it with the surrounding air and the amount that is produced in a mono is not enough to counter the rise of heat and water vapor. All the chemicals created get mixed in with the warm humid air and is carried out the top. Math doesn't tell the whole story when it leaves out too many variables.




I agree, the effect of the humid air is much greater than that of the additional CO2. As a result, the air will be going upwards until the sub dries out or is spent and dies. The heat generated by the substrate is the most important part. Once that is gone, you lose the ability to evaporate water and heat the air in the monotub, and the air flow can reverse.
In any properly functioning monotub, the airflow should be upward.

Extras: Filter Print Post Top
OfflineKilling Hours
Time keeps on slippin'


Registered: 01/24/16
Posts: 83
Last seen: 5 years, 5 months
Re: Themodynamic Analysis of Monotub Air Currents [Re: GreenRabbit]
    #22969317 - 03/03/16 12:29 PM (8 years, 10 months ago)

:popcorn:

Thanks for the write up GreenRabbit!


--------------------
Experience is what you get, when you don't get what you want
Noob 2 Noob Guide - My Success Story

Extras: Filter Print Post Top
InvisibleSpitballJedi
Ancient Astronaut
Male User Gallery


Registered: 10/13/12
Posts: 8,598
Loc: Nibiru Flag
Trusted Cultivator
Re: Themodynamic Analysis of Monotub Air Currents [Re: GreenRabbit]
    #22969357 - 03/03/16 12:46 PM (8 years, 10 months ago)

Quote:

GreenRabbit said:
Quote:

SpitballJedi said:
Some air does come in through the tightly stuffed bottom holes. That's why you get a dry ring. But, most of the air exchange is through the top. As the air flows out the top, somewhat of a vacuum is created that pulls dry air in the bottom. The higher the flow rate, the bigger the dry ring gets. Because the bottom holes are close to the substrate, slowing the flow coming in helps prevent the substrate surface from drying out.




The same amount of air overall is going in the bottom holes as it is going out the top holes. Due to the larger size of the bottom holes, the air will flow through them slower.

The top and bottom holes are the same size on most peoples monotubs, including mine and it's the tightness of the poly that restricts the flow and more air can flow through larger holes if otherwise not covered or stuffed. In a vacuum or still air room, then yes, the air coming in the mono's bottom would likely equal the flow going out the top due to simple displacement. But, most grow rooms we have at home are drafty and the poly plays a role in how much additional air can move in either direction of any given hole. Air will follows the path of least resistance and/or greater force.

Quote:

GreenRabbit said:
Now, if the top holes are stuffed loosely, but still enough to stem free air travel, then the air would actually be sucked in the top holes as air is pulled out the bottom by gravity.




Quote:

SpitballJedi said:
There's no stuffing scenario that will cause air to be sucked in to the top. Air coming in the top is because of natural currents and drafts in the room. The only way to get air to suck in through the top holes is to attach a device that sucks or pushes air out the bottom that causes enough vacuum to reverse the natural rise of heat and water vapor. If the holes on top are loose and the bottom is tight, a fan in the room pushes more air through the top than normal, but the tub is not sucking in, the air is being pushed in and most of it will still flow right back out the top top because that would still be the path of least resistance for the added internal pressure caused by the fan.




Yea, I should edit the OP. Air flow can reverse but it has nothing to do with stuffing. It will reverse if the sub dries out and humidity drops.

Actually, it can have a lot to do with the stuffing in a drafty room. The poly restricts flow in either direction. No poly on top means more air can be blown in. Stuffed tightly and less air can be blown in. The natural drafts in a room are often over looked when thinking about the dynamics of an FC.

Quote:

GreenRabbit said:This is why monotubs can be on the ground, and SGFCs need to be raised. And SGFC works in a totally different way, so air flows upwards instead.




Quote:

GreenRabbit said:Hot humid air rises, sure, but the air in the tub isn't the same chemical composition as the incoming air. It mixes and on average is more dense than the ambient air. Refer to Air Density Calculation for densities of different compositions of air.




Quote:

SpitballJedi said:
The difference in chemical make up is not enough to counter the forces created by heat and water vapor's natural inclination to rise. Yes, CO2 is more dense than the air we breath, but the tiniest amount of turbulence will mix it with the surrounding air and the amount that is produced in a mono is not enough to counter the rise of heat and water vapor. All the chemicals created get mixed in with the warm humid air and is carried out the top. Math doesn't tell the whole story when it leaves out too many variables.




I agree, the effect of the humid air is much greater than that of the additional CO2. As a result, the air will be going upwards until the sub dries out or is spent and dies. The heat generated by the substrate is the most important part. Once that is gone, you lose the ability to evaporate water and heat the air in the monotub, and the air flow can reverse.
In any properly functioning monotub, the airflow should be upward.




yes, heat will definitely cause evaporation to happen faster, air to rise faster and also cause humid air to rise even faster. But, even if the temperatures are the same inside and outside, which doesn't happen in a live sub in a mono, water will still evaporate, albeit slower, and the vapor will still rise. The flow will not reverse unless some other force is added to make it happen, such as drafts or the sub becomes cooler than the room. But, once your sub is dead or spent, none of it really matters because you're done...lol.

As I mentioned earlier, natural drafts and currents in a room play a bigger role than some may realize. It may seem subtle, but so are the currents created in our FCs. Many of the ways we understand flows and dynamics don't take into consideration how much impact tiny changes around the tubs can have. The environment in a mono is pretty delicate and easily impacted. Just ask people who put fans in a room as a matter of coarse instead of waiting to see if they need one.

Your willingness to change your opinion in light of new information is a great credit to your character. We need more people like you. I still update my write-ups when I get new info or understanding and your openness to do the same is a great value often missed. There's not a word I wouldn't change in any write-up I've done if someone pointed out the error. Evolving the community begins with evolving our self.


--------------------
The Basics
A little civility goes a long way

The Noob Forum
The Hammock Hangers' Forum

Extras: Filter Print Post Top
OfflineGreenRabbit
Plutonium Pollinator
Male


Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 3 years, 3 months
Re: Themodynamic Analysis of Monotub Air Currents [Re: SpitballJedi]
    #22969696 - 03/03/16 02:51 PM (8 years, 10 months ago)

This analysis was written with the assumption that the top holes are stuffed.
I acknowledged that open top holes would allow air to flow in freely, and that is a system that is far too random to be able to analyze.
When a tub has no stuffing in the top holes, air doesn't have to flow up or down. It can flow in one top hole and out the other.

I like having smaller holes up top, but yea, if your holes are the same size, and there are 2 bottoms holes total then air velocities have to be equal, even with a difference in stuffing. Volume in always has to equal volume out.

As far as tubs being the same temperature as the ambient air, this is more likely to happen in a tub with light stuffing, which would allow more airflow, and less time for the air in the tub to warm up. I've run several tubs with thermometers inside the tub and sitting just outside, and have observed at least a 3-5 degree F difference at most times of the day. They tend to equal out in the middle of the day, then when the ambient air cools, the tub air holds its heat a little longer. The tub is almost always warmer than ambient at night.

Yes, water will still evaporate if the temperatures are equal, and the density of the tub air will be lower than that of the ambient, causing the rise.

I don't think we are disagreeing anywhere anymore.

Extras: Filter Print Post Top
InvisibleSpitballJedi
Ancient Astronaut
Male User Gallery


Registered: 10/13/12
Posts: 8,598
Loc: Nibiru Flag
Trusted Cultivator
Re: Themodynamic Analysis of Monotub Air Currents [Re: GreenRabbit]
    #22970409 - 03/03/16 06:05 PM (8 years, 10 months ago)

:youthemandawg:


--------------------
The Basics
A little civility goes a long way

The Noob Forum
The Hammock Hangers' Forum

Extras: Filter Print Post Top
Offlinecamplo
Freedom!


Registered: 02/10/08
Posts: 1,675
Last seen: 3 years, 3 months
Re: Themodynamic Analysis of Monotub Air Currents [Re: SpitballJedi]
    #22971195 - 03/03/16 09:30 PM (8 years, 10 months ago)

Quote:


Your willingness to change your opinion in light of new information is a great credit to your character. We need more people like you. I still update my write-ups when I get new info or understanding and your openness to do the same is a great value often missed. There's not a word I wouldn't change in any write-up I've done if someone pointed out the error. Evolving the community begins with evolving our self.



:glorious:  :dandyzoom:  :singletear:


I did come across this text book explanation in case its needed "You might also say: “Water is heavier than air.” True, a glass of liquid water weighs more than a glass filled only with air. But, humidity is water vapor, not liquid water, and water vapor molecules are lighter than the molecules of nitrogen and oxygen that make up approximately 99% of the atmosphere."


--------------------
:three:

Extras: Filter Print Post Top
InvisiblebodhisattaMDiscordReddit
Smurf real estate agent
 User Gallery
Folding@home Statistics
Registered: 04/30/13
Posts: 61,915
Loc: Milky way
Trusted Cultivator
Re: Themodynamic Analysis of Monotub Air Currents [Re: camplo]
    #22971207 - 03/03/16 09:38 PM (8 years, 10 months ago)

and warm humid air rises best. clouds how do they work

Extras: Filter Print Post Top
OfflineGreenRabbit
Plutonium Pollinator
Male


Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 3 years, 3 months
Re: Themodynamic Analysis of Monotub Air Currents [Re: bodhisatta]
    #22971634 - 03/04/16 02:05 AM (8 years, 10 months ago)

Humid air: 0.804  kg/m3
Dry air  : 1.293  kg/m3

02      : 1.185  kg/m3
C02      : 1.98  kg/m3

Humid air is only 62% of the density of dry air.

Extras: Filter Print Post Top
OfflineKizzle
Misanthrope
 User Gallery

Registered: 08/30/11
Posts: 9,870
Last seen: 2 months, 8 days
Trusted Cultivator
Re: Themodynamic Analysis of Monotub Air Currents [Re: GreenRabbit]
    #22974595 - 03/05/16 02:16 AM (8 years, 10 months ago)

Quote:

What you are describing is a convection current, and I don't believe they exist in a monotub. I don't think air is circling around like you say.
I think the updrafts are caused by air leaving the tub and air being pulled in the bottom holes.
I've been looking for photos of grows with good tracks from spore deposits and I've found many with mushrooms in the corners with spores on them, suggesting a updraft throughout the whole tub, not just in the center.



I said the air circles inside without the holes. Although the air is still circling with adequate holes and both the top and bottom, the downdraft will on the outside the tub and the updraft will be inside.

It makes sense to have the polyfil tighter on the top or bottom because for air to leave the top the same amount needs to be able to enter on the bottom. Pointing a fan at a hole has the same as simply making the hole bigger or loosening the polyfil in it.

Edited by Kizzle (03/05/16 02:51 AM)

Extras: Filter Print Post Top
OfflineCaptain67
Some geek dude
Male


Registered: 06/24/16
Posts: 57
Loc: Canada Flag
Last seen: 8 years, 19 days
Re: Themodynamic Analysis of Monotub Air Currents [Re: GreenRabbit]
    #23392196 - 06/28/16 08:37 PM (8 years, 6 months ago)

Thank you so much for your analysis GR, I was just about to make a new mono and since it's a big 80 litre tub I wasn't sure what to do for holes. Your math work (which I had to read multiple times to understand) allowed me to scale up and decide the position for the openings effectively and efficiently.
I must say I also had much more fun applying your more complex design as opposed to just 4 holes.
Thanks again.


--------------------
Synthetics betrayed me, and warped my mind. Nature mended it.

Extras: Filter Print Post Top
OfflineGreenRabbit
Plutonium Pollinator
Male


Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 3 years, 3 months
Re: Themodynamic Analysis of Monotub Air Currents [Re: Captain67]
    #23392601 - 06/28/16 10:56 PM (8 years, 6 months ago)

Thanks for reading.
You might want to use a few smaller holes and spread them out. Bigger holes are harder to stuff.


I don't use polyfill anymore.



The holes can be taped up if it dries out too quickly, but usually I just fruit them open and mist them when they dry out.

Extras: Filter Print Post Top
OfflineCaptain67
Some geek dude
Male


Registered: 06/24/16
Posts: 57
Loc: Canada Flag
Last seen: 8 years, 19 days
Re: Themodynamic Analysis of Monotub Air Currents [Re: GreenRabbit]
    #23392735 - 06/29/16 12:05 AM (8 years, 6 months ago)

I've been trying to figure out a good filter media to replace the polyfil. Faux silk made from polyester seems like it might work if layered and crosshatched. It'd be flat instead of balled. The threads are very fine. The part I can't work out is how many layers to put on top and bottom to make an equivalent to the "dialed in" density used in Frank's tek.


--------------------
Synthetics betrayed me, and warped my mind. Nature mended it.

Extras: Filter Print Post Top
OfflineTheBlackCat
Possibly Human
Female User Gallery


Registered: 10/05/16
Posts: 2,819
Last seen: 2 years, 5 months
Re: Thermodynamic Analysis of Monotub Air Currents [Re: GreenRabbit]
    #24389791 - 06/08/17 10:53 PM (7 years, 7 months ago)

:takingnotes:


--------------------

Extras: Filter Print Post Top
Jump to top Pages: < Back | 1 | 2 | 3 | 4 | 5 | Next >  [ show all ]

Shop: Left Coast Kratom Buy Kratom Extract   PhytoExtractum Buy Bali Kratom Powder   North Spore Bulk Substrate   Original Sensible Seeds Bulk Cannabis Seeds   OlympusMyco.com No Unicorns Here—Just Quality Bags That Work   Mushroom-Hut Substrate Bags   Kraken Kratom Red Vein Kratom   Myyco.com Isolated Cubensis Liquid Culture For Sale   MagicBag.co Certified Organic All-In-One Grow Bags


Similar ThreadsPosterViewsRepliesLast post
* Colonization vs. Fruiting Bod's Unmodified Monotub multifractal 6,217 6 05/04/21 04:27 AM
by Goatrider
* Fan INSIDE Monotub **Idea** JustAHobby 3,068 5 06/23/07 06:33 PM
by MYSTIQUE
* Monotub bruising lastround360 1,186 1 05/04/21 11:00 PM
by tiptrippy
* Help- PF Cakes Spawned to Coir/Hpoo cased with MGMC in Monotub eltrkbrd 3,178 0 03/07/07 02:50 PM
by eltrkbrd
* Spawning in my Monotub
( 1 2 all )
Atheist 4,333 24 06/13/06 10:40 PM
by Liquidkick
* Monotub ambient room Temp/humidity? Insane_Wayne 8,130 12 09/29/06 05:36 PM
by Blutjager
* A few monotub questions Dmac45 880 4 09/01/06 02:01 PM
by CantiSama
* Peeking at my monotub(Now with pics!) Am I ready to case? tooth 3,430 14 03/10/07 11:55 AM
by tooth

Extra information
You cannot start new topics / You cannot reply to topics
HTML is disabled / BBCode is enabled
Moderator: Shroomism, george castanza, RogerRabbit, veggie, mushboy, fahtster, LogicaL Chaos, 13shrooms, hamloaf, cronicr, Stipe-n Cap, Pastywhyte, bodhisatta, Tormato, Land Trout, A.k.a
19,722 topic views. 25 members, 75 guests and 20 web crawlers are browsing this forum.
[ Show Images Only | Sort by Score | Print Topic ]
Search this thread:

Copyright 1997-2025 Mind Media. Some rights reserved.

Generated in 0.029 seconds spending 0.006 seconds on 14 queries.