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OfflineBeatroot
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Registered: 02/12/23
Posts: 2
Last seen: 1 year, 10 months
Pressure Cooking Substrate - is cooldown time important?
    #28183795 - 02/12/23 10:34 AM (1 year, 10 months ago)

Hi guys

i'm using roughly CVG mixture for substrate. Currently experimenting with placing the mixture in a bag (suitable for high temp) inside a electric pressure cooker. I pressure cook for arround one hour at max pressure (probably arround 12-14PSI).

Question: i often see mentions of cooling down for over night, 8-10h. But is it ok to cool it quicker by placing the bag into cold water and cool it in 1-2h until it's consistenly at arround body temperature? Or is the hourslong cooldown period in itself necessary for sterilization/pasteurization?

Do you think the method is good?

Thanks!


Disclaimer: i'm growing since about 6 months, with increasing results. lots to learn...  still, i do have contamination issues at various stages, but decreasing. currently working mostly with LC, which was quite a gamechanger. still having lots of headscratchers, like 1 bag begcoming a perfect cake, and the other showing barely signs of growth, just filth :-) even though from the exact same badge of grain cooking and injection. and then after several successful monotubs, suddenly one that looked perfect in the beginning and ends up a mold-fest within a week. :crazy:

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Offlinecozmyc
gentle modern ape
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Registered: 06/20/21
Posts: 2,154
Last seen: 12 days, 23 hours
Re: Pressure Cooking Substrate - is cooldown time important? [Re: Beatroot]
    #28183800 - 02/12/23 10:37 AM (1 year, 10 months ago)

Welcome :mushroom2:
No need to sterilize CVG, it doesn't have nutes like grain does. Many folks here just add tap water straight to coir and go.


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Offlinefiddle_head
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Registered: 08/05/08
Posts: 3,694
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Last seen: 10 hours, 35 minutes
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Re: Pressure Cooking Substrate - is cooldown time important? [Re: Beatroot]
    #28183806 - 02/12/23 10:42 AM (1 year, 10 months ago)

Just do this:

https://www.shroomery.org/forums/showflat.php/Number/11916595

Or you can follow Bods updated version, anyway CV doesn’t need to be sterilized and the gypsum is pretty useless if you’re growing cubes.

I do:
1 650g brick coir
3qt verm
4.5qt boiling water

Seal that bitch but leave a little gap so you don’t have suction or warping issues.
I use mine 24hrs later but you can use it when it is cool to the touch.


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OfflineBeatroot
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Registered: 02/12/23
Posts: 2
Last seen: 1 year, 10 months
Re: Pressure Cooking Substrate - is cooldown time important? [Re: fiddle_head]
    #28183834 - 02/12/23 10:58 AM (1 year, 10 months ago)

ok, then it seems i'm on the save side with 1h pressure cooking.

but since my electric pressure cooker maxes out at 1h, that's how much i pc the rye bag. could be on the short side?

Quote:

1 650g brick coir
3qt verm




is that 3qt of dry verm i presume? (i probably use less)

Edited by Beatroot (02/12/23 11:00 AM)

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