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InvisibleLedd
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RH and Misting
    #8677146 - 07/24/08 05:04 PM (16 years, 5 months ago)

I am beginning to see pins on my first grow (PF cakes).

My Shotgun FC has cazy humidity. I can leave the top off and retain 99%25RH. Should I still mist?


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Offlinenugjug
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Re: RH and Misting [Re: Ledd]
    #8677320 - 07/24/08 05:55 PM (16 years, 5 months ago)

If you already have pins then there is no need to mist anymore. Especially if your RH is staying so high.  I do the dunk and roll and only mist enough to keep the verm slightly hydrated.  After that I let them pin and fruit away till the next redunk.

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InvisibleLedd
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Re: RH and Misting [Re: nugjug]
    #8677329 - 07/24/08 06:00 PM (16 years, 5 months ago)

Sweet thanks man.

:peace:Led


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OfflinePowerOfTheCoir
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Re: RH and Misting [Re: Ledd]
    #8677431 - 07/24/08 06:48 PM (16 years, 5 months ago)

Leave it alone at the pinning stage, but misting once they start to grow larger is beneficial. Just fan off any excess moisture after misting. It's only standing water on mushroom tissue that causes problems. They can benefit from absorbing a little misted water directly into the fruits.

If your hygrometer is saying 99% RH without a lid, I'd be suspicious. Humid air is lighter than dry air, so a mass of humid air will easily escape if allowed to go straight up. Many hygrometers (especially cheap ones) will allow condensation to form inside them and then you'll get very high readings no matter what the real RH is. Most hygrometers are meant to monitor drier environments, and even then not with much accuracy.

BTW, I didn't mistype - wet air weighs less than the same volume of dry air. It's counterintuitive, but with a little high school chemistry and physics it makes sense:

1) Two bodies of air at the same pressure have the same number of molecules per cubic meter.

2) Adding water vapor to air replaces some of the other molecules with H2O molecules. Thus, humid air has less O2 and N2 (the major components of air) than dry air and has H20 in their place.

3) A single molecule of H20 weighs less than either O2 or N2 because hydrogen is extremely light.

Therefore, air which contains H2O in place of N2 and O2 will weight less than drier air. This humid air will rise upward if no lid is there to slow it down.


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InvisibleLedd
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Re: RH and Misting [Re: PowerOfTheCoir]
    #8678767 - 07/25/08 12:31 AM (16 years, 5 months ago)

Thanks POC. On later inspection I noticed it drop to 96% or so during fanning. I also calibrated with wet salt before hand and got 73% so I know it's pretty close.

It takes a lot if fanning to evaporate standing water...

I', so excited seeing my first grow start to pin.

There is something deeply satisfying with bringing something so important to me into existence.

What a yin-yang experience. Without me, there is no new mushroom. And without the mushroom, there is no new me!

...What a cultural misunderstanding...


:peace:Led


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