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Captain Cubensis
Bleeding HeartLiberal


Registered: 09/18/07
Posts: 648
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95% Humidity is fine for fruiting Cased Substrates
#7840097 - 01/06/08 03:24 PM (16 years, 26 days ago) |
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For years people have been struggling with, why is my humidity only 92%, or why is my casing drowned in water.
The truth is, trying to maintain 100% Rh will ruin your project.
82% to 92% is fine for casings.
So many posts deal with this issue, and the reason is this myth/lie.
Yes, I know 95% Rh does not cause all surfaces to condense in all climates and conditions.
I meant condensation begins in my FC around 95% Rh, there is little to no condensation at 92%, at least not in my foaf's FCs.
The relative humidity of a system is dependent not only on the temperature but also on the absolute pressure of the system of interest. Therefore, a change in relative humidity can be explained by a change in system temperature, a change in the absolute pressure of the system, or change in both of these system properties.
No one talks about pressure in terms of Rh, but it is as much a factor as temp.
Liquid water (and ice, at the appropriate temperature) will fail to lose mass through evaporation when exposed to saturated air.
Therefore there can be no evaporation at 100% Rh with 100% saturated air.
It may also correspond to the possibility of dew or fog forming (condensation), within a space that lacks temperature differences among its portions, for instance in response to decreasing temperature.
Edited by Captain Cubensis (01/10/08 12:32 PM)
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tahoe
Noob Slayer



Registered: 11/26/03
Posts: 6,274
Loc: N38.93829W119.98108
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wiht knowledge like that it is no wonder why you are the captain we arent
-------------------- Stop experimenting half way through your first grow. Grow it to maturity, watch it, learn from it. Do this a few times then experiment with different ideas and figure out what works best for you.
My Legacy https://www.shroomery.org/forums/showflat.php/Number/22140987#22140987 Teh=The I need to proofread
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veda_sticks
Cultivator




Registered: 07/29/07
Posts: 14,191
Loc: UK
Last seen: 4 years, 25 days
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Re: The Myth of 100% Humidity [Re: tahoe]
#7840159 - 01/06/08 03:37 PM (16 years, 26 days ago) |
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Are you using pperlite or a humidifier.
If you are using a humidifier, make sure it is the right one. Search.
-------------------- PF TEK - writeup by EvilMushroom666 Lets Grow Mushrooms - RogerRabbit & RoadKills website with sample videos plus the full PF TEK video series. Alot of great information - BUY THE DVD Cakes can and will pin! - So you think cakes suck for pins. Your wrong Franks Simple Coir/Verm Tek Franks Proper Pasturisation Tek Franks Spawning To Bulk - Monotub Professor Pinheads RTV Injection Port Tek Foo Mans No Soak WBS Prep Tek
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Captain Cubensis
Bleeding HeartLiberal


Registered: 09/18/07
Posts: 648
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Re: The Myth of 100% Humidity [Re: tahoe]
#7840165 - 01/06/08 03:39 PM (16 years, 26 days ago) |
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Noobs need to hear this though, they are repeatedly told to strive for 100% Rh 24/7, which of course ruins all new projects.
-------------------- www.groworganic.com Get 350lbs shipped to your door for only $100! www.mycosupply.com Online Organic Rye Berries www.hydroponics.net/i/200002 The Cyclestat 4P, a great repeat cycle timer made in the USA.
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tahoe
Noob Slayer



Registered: 11/26/03
Posts: 6,274
Loc: N38.93829W119.98108
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there is a lot of misinformation here
-------------------- Stop experimenting half way through your first grow. Grow it to maturity, watch it, learn from it. Do this a few times then experiment with different ideas and figure out what works best for you.
My Legacy https://www.shroomery.org/forums/showflat.php/Number/22140987#22140987 Teh=The I need to proofread
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Captain Cubensis
Bleeding HeartLiberal


Registered: 09/18/07
Posts: 648
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Re: The Myth of 100% Humidity [Re: tahoe]
#7840188 - 01/06/08 03:47 PM (16 years, 26 days ago) |
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Everyone starts with perlite, and when the Rh is only mid 80s, they go buy an ultra or cool mist, and pump up the Rh to 99%, soaking everything is a bath of contams and dirty water.
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xhooliganx
Munky


Registered: 03/09/06
Posts: 900
Loc: reno, nevada
Last seen: 2 years, 8 months
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an impeler type coolmist shouldn't be causeing flooding or ruining your projects unless it is set inside the fc. I keep right up to 95% humidity in my fc using a homemade humidifier with an ultrasonic fogger on a timer, aquarium pump and fan with no problems.
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KillerPicklez



Registered: 12/13/07
Posts: 16,920
Loc:
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Re: The Myth of 100% Humidity [Re: xhooliganx]
#7840246 - 01/06/08 04:07 PM (16 years, 26 days ago) |
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Quote:
xhooliganx said: an impeler type coolmist shouldn't be causeing flooding or ruining your projects unless it is set inside the fc. I keep right up to 95% humidity in my fc using a homemade humidifier with an ultrasonic fogger on a timer, aquarium pump and fan with no problems.

I only use a vicks coolmist and maintain 95% rH and my casings never have a problem
Ive been reading a lot in the past week and havent seen anyone suggest 100% rH for casings, only for cakes.
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Captain Cubensis
Bleeding HeartLiberal


Registered: 09/18/07
Posts: 648
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Re: The Myth of 100% Humidity [Re: xhooliganx]
#7840252 - 01/06/08 04:08 PM (16 years, 26 days ago) |
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Quote:
xhooliganx said: an impeler type coolmist shouldn't be causeing flooding or ruining your projects unless it is set inside the fc. I keep right up to 95% humidity in my fc using a homemade humidifier with an ultrasonic fogger on a timer, aquarium pump and fan with no problems.
Any pics?
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Nebula
Stranger


Registered: 10/22/07
Posts: 172
Last seen: 15 years, 11 months
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What will at 100% RH is that water will condense, 'cause the air can hold no more water. So water droplets can appear on your cakes. Now is that really bad? If so, then probably oppose misting too!
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 3 days
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Re: The Myth of 100% Humidity [Re: Nebula]
#7840315 - 01/06/08 04:25 PM (16 years, 26 days ago) |
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Hang on a second. 100% humidity means the air is saturated. Having the air saturated in no way is going to flood your cakes. What WILL flood your cakes is pumping from a humidifier AFTER the air is already at 100%. That's why I recommend three to five inches of well drained perlite for a terrarium, and no mechanical humidifier. This way, if your humidity reads less than 95%, it means you need to calibrate your hygrometer.
Mycelium will pin best at or near saturation humidity and plenty of fresh air, whether the substrate is cased or not. A casing layer simply helps to hold humidity high right at the surface, under less than ideal ambient conditions. Of course, once pins form, the casing layer also helps to supply the substrate below with moisture, so you want to keep the humidity high to prevent the casing layer from drying out too much between mistings. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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Captain Cubensis
Bleeding HeartLiberal


Registered: 09/18/07
Posts: 648
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Re: The Myth of 100% Humidity [Re: RogerRabbit]
#7840473 - 01/06/08 05:08 PM (16 years, 26 days ago) |
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But what about all the talk that droplets on your pins will casue aborts?
Condensation begins on all surfaces at about 95%.
So if 92% is good enough, why not stop there, assuming the casing layer gives you another 5% micro.
Shouldn't you avoid condensation and misting untill pinset, then provide periodic mistings?
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Crasher
αἱρετίζω




Registered: 03/13/01
Posts: 6,220
Loc: Tardy to the Party
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God these posts of yours are getting old...
-------------------- Give me silence, water, hope; Give me struggle, iron, volcanoes...
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Captain Cubensis
Bleeding HeartLiberal


Registered: 09/18/07
Posts: 648
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Re: The Myth of 100% Humidity [Re: Crasher]
#7840512 - 01/06/08 05:21 PM (16 years, 26 days ago) |
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Quote:
Crasher said: God these posts of yours are getting old...
Yet you take the time to respond but add nothing to the discussion?
There are 100,000 posts to search and read, surely you can ignore mine.
Just ignore me, please.
-------------------- www.groworganic.com Get 350lbs shipped to your door for only $100! www.mycosupply.com Online Organic Rye Berries www.hydroponics.net/i/200002 The Cyclestat 4P, a great repeat cycle timer made in the USA.
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DontPlay
Yeah Science!



Registered: 12/13/07
Posts: 750
Loc: On Land most of the time....
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Re: The Myth of 100% Humidity [Re: Crasher]
#7840529 - 01/06/08 05:23 PM (16 years, 26 days ago) |
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It's starting to seem that Captain is just trying to say he thought of something new and innovative and is kinda going about it in the wrong way. Im not trying to sound like an ass but im a noob and myself am tired of hearing things that make no sense. You should find the answers to these "enlightened ideas" and then post results of your findings.
I believe the mushrooms and cake will absorb the tiny water droplets created by humidity or misting.They use alot of water in the process from start to finish.
Crashers sig comes to mind Your idea isn't new or groundbreaking. Your clever alteration of a tek without understanding the underlying principles will fail. It's been done before. Now use the search engine.
-------------------- My Trade List I hate to advocate drugs, alcohol, violence, or insanity to anyone, but they've always worked for me. Hunter S. Thompson
I prefer dangerous freedom over peaceful slavery. ~Thomas Jefferson
Edited by DontPlay (01/06/08 05:25 PM)
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HeadFood
Shroomer



Registered: 12/30/07
Posts: 390
Last seen: 11 years, 1 month
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Re: The Myth of 100% Humidity [Re: Crasher]
#7840579 - 01/06/08 05:37 PM (16 years, 26 days ago) |
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does this apply with cakes too or do cakes need 100%?
-------------------- Phi Alpha
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 3 days
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Quote:
Captain Cubensis said: But what about all the talk that droplets on your pins will casue aborts?
Condensation begins on all surfaces at about 95%.
So if 92% is good enough, why not stop there, assuming the casing layer gives you another 5% micro.
Shouldn't you avoid condensation and misting untill pinset, then provide periodic mistings?
Droplets on your pins will not cause aborts. It's recommended to mist mushrooms. Air exchange must be provided because stagnant water sitting on a mushroom in stagnant air for an extended period WILL cause aborts.
Condensation does not begin on all surfaces at about 95%. My can of cold beer gets condensation in Arizona in the summer. I know it's not 95% there. Condensation forms on my windows in winter, even when humidity in the house is less than 50%. Condensation is a function of the temperature differential on either side of a surface. Condensation forms on the warm side. Condensation won't even form on your mushrooms at 100% humidity. If they get wet, it's because liquid water droplets were thrown on them, not humidity in the air.
92% humidity will be fine with a good casing layer. I prefer higher, but lower will also still work, only requiring more frequent misting. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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KillerPicklez



Registered: 12/13/07
Posts: 16,920
Loc:
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Re: The Myth of 100% Humidity [Re: HeadFood]
#7840630 - 01/06/08 05:46 PM (16 years, 26 days ago) |
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Quote:
HeadFood said: does this apply with cakes too or do cakes need 100%?
This is the exact reason why CaptainCubensis detracts from the community, he has now confused someone.
in my opinion, the higher the humidity, the better, as long as you dont have standing water and provide plenty of FAE you will have great results.
just try to the humidity between 90-99% and you'll be fine
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HeadFood
Shroomer



Registered: 12/30/07
Posts: 390
Last seen: 11 years, 1 month
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Thanks killer. Thats what I had thought but casings were the only thing mentioned, just wanted to make sure.
-------------------- Phi Alpha
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somebody041
bud tester


Registered: 06/04/07
Posts: 476
Loc: California
Last seen: 9 years, 9 months
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Quote:
KillerPicklez said:
Quote:
HeadFood said: does this apply with cakes too or do cakes need 100%?
This is the exact reason why CaptainCubensis detracts from the community, he has now confused someone.
in my opinion, the higher the humidity, the better, as long as you dont have standing water and provide plenty of FAE you will have great results.
just try to the humidity between 90-99% and you'll be fine
Yup, exactly. If you post a question that's fine... but for the love of god please stop posting "information"
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