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OfflinePowerTrip
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PMP stuck at 85% humidity.(Pics)
    #4035421 - 04/09/05 10:11 PM (11 years, 7 months ago)

I did a lot of research and a lot of running around trying to build my PMP to perfection. Today when I put a hygrometer in it, I was bothered by the fact that it only read 85%.

(Everything looks blue because my fluorescent is in the actinic spectrum)
I would really like to believe that the hygrometer is just a piece of shit. I tried to remedy the problem by spraying my misty mate all over the pod, even directly at the hygrometer, and it still only reads 85%. I have approximately 4.5 inches of hydroton, and 3.5 inches of water in it. I have more hydroton if that will solve this problem. So much work and money put into my beautiful pmp, only for it to fall short of its glory.



--------------------
I spit reality, instead of what you usually learn
and I refuse to be concerned with condescending advice
cause I'm the only motherfucker that can change my life


Edited by PowerTrip (04/09/05 10:18 PM)


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Offlinedfslkfsd
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Re: PMP stuck at 85% humidity.(Pics) [Re: PowerTrip]
    #4035439 - 04/09/05 10:19 PM (11 years, 7 months ago)

Is that a black light your using? I didnt know you could use those for a light source.


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OfflinePowerTrip
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Re: PMP stuck at 85% humidity.(Pics) [Re: dfslkfsd]
    #4035443 - 04/09/05 10:23 PM (11 years, 7 months ago)

Quote:

dfslkfsd said:
Is that a black light your using? I didnt know you could use those for a light source.




It's a Marine-Glo light that is made for aquatic plant life. It just happens to be in the right spectrum for mushrooms also.


--------------------
I spit reality, instead of what you usually learn
and I refuse to be concerned with condescending advice
cause I'm the only motherfucker that can change my life


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InvisibleHolydiver
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Re: PMP stuck at 85% humidity.(Pics) [Re: PowerTrip]
    #4035454 - 04/09/05 10:27 PM (11 years, 7 months ago)

Don't place the light so close to your chamber for starters. Move it away a bit and you'll probably see a change.

Also, manually misting the walls is a quick, easy way to get extra moisture.


--------------------
To find a place to live between the negatives and positives.


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OfflinePowerTrip
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Re: PMP stuck at 85% humidity.(Pics) [Re: Holydiver]
    #4035480 - 04/09/05 10:38 PM (11 years, 7 months ago)

Quote:

Diver said:
Don't place the light so close to your chamber for starters. Move it away a bit and you'll probably see a change.

Also, manually misting the walls is a quick, easy way to get extra moisture.




Actually I just added the light today, and before that my humidity was only at 80%. I removed some water from my pod because the water level was at about 4" and that only left a half inch of extra hydroton on top. Removing the water seems to have helped slightly.

The light doesn't get very hot at all. I can hold my hand on it even after it has been running for hours. It's made to sit two inches above a fish tank so it isn't supposed to cook whatever is underneath it.


--------------------
I spit reality, instead of what you usually learn
and I refuse to be concerned with condescending advice
cause I'm the only motherfucker that can change my life


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OfflinePowerTrip
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Re: PMP stuck at 85% humidity.(Pics) [Re: PowerTrip]
    #4035564 - 04/09/05 11:10 PM (11 years, 7 months ago)

Update:
After spraying the entire pod with a Misty Mate, after some time elapsed, the hygrometer now reads 87%. I removed my light from the top of the tank as Diver suggested, just to make sure that wasn't causing my problem. The humidity reading has not changed at all in 30 minutes, and the temperature reading only changed by a few tenths of a degree.

After reading up on some perlite techniques in the FAQ's I found that it is important to have enough of a layer of dry perlite on top to get moisture into the air. I'm going to try adding another half inch or so of hydroton on top to see if I can bring the humidity up to 90% or so.


--------------------
I spit reality, instead of what you usually learn
and I refuse to be concerned with condescending advice
cause I'm the only motherfucker that can change my life


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OfflinePowerTrip
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Re: PMP stuck at 85% humidity.(Pics) [Re: PowerTrip]
    #4035922 - 04/10/05 01:43 AM (11 years, 7 months ago)

After adding approximately half an inch of hydroton, the humidity seems to be staying at 88%. This is of course according to my pos hygrometer, so it could be +/- 5%.


--------------------
I spit reality, instead of what you usually learn
and I refuse to be concerned with condescending advice
cause I'm the only motherfucker that can change my life


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Offlinegoofy98
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Re: PMP stuck at 85% humidity.(Pics) [Re: PowerTrip]
    #4035927 - 04/10/05 01:47 AM (11 years, 7 months ago)

is there condesation on the sides of the PmP?

And if there is, is the whats the room temp.

If the room temp is around 70's and their is condensation on the sides and top, then your probly at around 95-100% RH


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OfflineBlue Helix
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Re: PMP stuck at 85% humidity.(Pics) [Re: goofy98]
    #4035972 - 04/10/05 02:11 AM (11 years, 7 months ago)

Digital hygrometers are notoriously inaccurate. I have about five of them, and all of them are rated +/- 3%. Of those over half of them are well over that inaccurate. 85% at 100% RH is not uncommon at all. You can calibrate a hygrometer with the salt test. Look it up if you don't know what it is. It is nearly impossible to have a sealed chamber at less than 100% RH when the bottom is covered by damp hydroton clay aggregrate.


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OfflinePowerTrip
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Re: PMP stuck at 85% humidity.(Pics) [Re: goofy98]
    #4035980 - 04/10/05 02:15 AM (11 years, 7 months ago)

Quote:

goofy98 said:
is there condensation on the sides of the PmP?

And if there is, is the whats the room temp.

If the room temp is around 70's and their is condensation on the sides and top, then your probly at around 95-100% RH




It's really strange. The first day I put the hydroton and water in my PMP it was like a rain forest in there. All of the sides and the lid had condensation on them. If I stuck my arm in there it felt very humid. A few days later, there is no condensation on the lid anymore and it doesn't really feel as humid as it did those first days. It was probably ten degrees warmer in my room those first days though. We were having really nice weather here and my computer running all the time also gives off some heat. That is really the only logical explanation I have for the perceived drop in humidity.


--------------------
I spit reality, instead of what you usually learn
and I refuse to be concerned with condescending advice
cause I'm the only motherfucker that can change my life


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OfflinePowerTrip
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Re: PMP stuck at 85% humidity.(Pics) [Re: Blue Helix]
    #4035989 - 04/10/05 02:20 AM (11 years, 7 months ago)

Quote:

Blue Helix said:
Digital hygrometers are notoriously inaccurate. I have about five of them, and all of them are rated +/- 3%. Of those over half of them are well over that inaccurate. 85% at 100% RH is not uncommon at all. You can calibrate a hygrometer with the salt test. Look it up if you don't know what it is. It is nearly impossible to have a sealed chamber at less than 100% RH when the bottom is covered by damp hydroton clay aggregrate.




Yeah, originally I was planning on buying a nice expensive hygrometer, until I looked at the specs and found that I would be paying $100+ for something that isn't even going to be accurate. I halfway bought this one out of curiosity and despite the fact that I know how inaccurate they are, I'm still letting the reading bother me lol.

My box is sealed extremely well though. I even put a weather strip along the top edge where the lid sits.


--------------------
I spit reality, instead of what you usually learn
and I refuse to be concerned with condescending advice
cause I'm the only motherfucker that can change my life


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OfflineAnjing
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Re: PMP stuck at 85% humidity.(Pics) [Re: PowerTrip]
    #4035997 - 04/10/05 02:25 AM (11 years, 7 months ago)

Offficerrrrrr! You act like an animal your out of control! Officerrrrrrr!!! what the hell is wrong with you wear a tie if you want to wear a uniform join the army if you want to conform tough guy asshole do what you can whatever you destroy we'll create it again!



Sorry,
Couldn't control myself....


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Offlineonetime
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Re: PMP stuck at 85% humidity.(Pics) [Re: PowerTrip]
    #4035999 - 04/10/05 02:26 AM (11 years, 7 months ago)

get one that is ceritified to be accurite there are a few good ones out there 50$ will get you a nice one i would think and any good one will say how inaccurite it is and tell you how much you must conensate for like some will say accurite within 5(+/-)% or something like that


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

See?
Yes, with my own three eyes.
Depression, Misspells , wanting everying thing i cant have haveing nothing i want


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Offlineonetime
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Re: PMP stuck at 85% humidity.(Pics) [Re: onetime]
    #4036001 - 04/10/05 02:28 AM (11 years, 7 months ago)

oh and one more thing if you can build something that nice then you have what it takes to to caseings and you can just get some small turkey pans and case those and stick those in there becouse they only need 85% rh insted of like 100% with cakes or what ever it is


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

See?
Yes, with my own three eyes.
Depression, Misspells , wanting everying thing i cant have haveing nothing i want


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OfflinePowerTrip
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Re: PMP stuck at 85% humidity.(Pics) [Re: onetime]
    #4036020 - 04/10/05 02:39 AM (11 years, 7 months ago)

Quote:

onetime said:
oh and one more thing if you can build something that nice then you have what it takes to to caseings and you can just get some small turkey pans and case those and stick those in there becouse they only need 85% rh insted of like 100% with cakes or what ever it is




The only reason I'm not doing casings at this point is because I don't need that many shrooms. As it is right now, I'm wondering what the hell I'm going to do with the ones I get off all of my cakes. I may try casing next time just for the learning experience though. The only benefit I see to casing is getting more shrooms unless I missed something.


--------------------
I spit reality, instead of what you usually learn
and I refuse to be concerned with condescending advice
cause I'm the only motherfucker that can change my life


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OfflinekronnyQ
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Re: PMP stuck at 85% humidity.(Pics) [Re: PowerTrip]
    #4036183 - 04/10/05 04:22 AM (11 years, 7 months ago)

Hmmm my opinion Powertrip is your aquarium pump sucks.

I had a PMP that size and I got great humidity levels with just one airstone at the bottom of the hydroton.


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Offlinehawksapprentice
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Re: PMP stuck at 85% humidity.(Pics) [Re: kronnyQ]
    #4036208 - 04/10/05 04:38 AM (11 years, 7 months ago)

Okay, i use the same exact tub you have (wal-mart?), i use airstones instead of wands though. Its possible that is your problem. The only difference other than that is I dont have mine airtight, I drill holes in the sides to allow for greater air exchange. Even though it seems contradictive for your humidity i would suggest it, the greater air flow could allow for better transpiration.


--------------------
"I celebrate the Earth, my home, my mother, my grave, and as long as men are Man they must, if they would preserve the integrated being, do the same---[and preserve]--this rank casual hungry smelly sweaty lusting transitory body, my oozy pulpy liquid-bag-swollen body, bones, blood, hair glands, my bejeweled sex; I love and celebrate it all.  never to let men forget that they are animals as much as gods---that is one thing I shall say."

  Edward Abbey


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OfflineKaptKid
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Re: PMP stuck at 85% humidity.(Pics) [Re: PowerTrip]
    #4036481 - 04/10/05 09:17 AM (11 years, 7 months ago)

http://www.shroomery.org/index/par/7993

Try this tek.Its worked good on the cheap ones.


:sun:


--------------------
Child of the 60's, Tripping ever since.


:sun:


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InvisibleShnezbit
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Re: PMP stuck at 85% humidity.(Pics) [Re: hawksapprentice]
    #4036486 - 04/10/05 09:19 AM (11 years, 7 months ago)

i heard that the air pump has nothing to do with air exchange. it says this in the archive pmp post i believe. the pump has only to do with air exchange. its the hydroton that contributes to the humidity. right now im in the process of making a pmp and i have 4inches of hydroton in a containor with 1 inch water from the top. there is no air wands yet. my hygrometer says 100% humidity.


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Offlinehawksapprentice
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Re: PMP stuck at 85% humidity.(Pics) [Re: Shnezbit]
    #4036492 - 04/10/05 09:27 AM (11 years, 7 months ago)

Quote:

Shnezbit said:
i heard that the air pump has nothing to do with air exchange. it says this in the archive pmp post i believe. the pump has only to do with air exchange. its the hydroton that contributes to the humidity.





That statement contradicts itself. The air pump does both in my opinion. If you dont have air bubbles coming up and "popping" moisture with the air coming up then you wont have as much moisture being released into the air. Im not sure if this is completely accurate or not. The air pump isnt the sole source of humidity and that is why you have hydroton but it does help.


--------------------
"I celebrate the Earth, my home, my mother, my grave, and as long as men are Man they must, if they would preserve the integrated being, do the same---[and preserve]--this rank casual hungry smelly sweaty lusting transitory body, my oozy pulpy liquid-bag-swollen body, bones, blood, hair glands, my bejeweled sex; I love and celebrate it all.  never to let men forget that they are animals as much as gods---that is one thing I shall say."

  Edward Abbey


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