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Offlineouuwee
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Is this the right kind of gypsum?
    #26602006 - 04/15/20 03:11 AM (3 years, 9 months ago)

https://www.menards.com/main/outdoors/gardening/lawn-plant-care/compost-soils-amendments/pelletized-gypsum-40-lbs/4050/p-1444440499457.htm



Is this the right kind of gypsum? My only concern is that on the product description, it states that it's not organic. Also, these are the ingredients

Calcium (Ca): 21%
Sulfur (S): 14%
Calcium Sulfate (CaSo4): 68%
Water Soluble Binder-lignosulfonate: 2%
Moisture (Maximum): 1%

Also, it's pelletized gypsum and not in powdered form. How would I use this kind of gypsum for preparation of grains and substrate? Do I need to crush them into powder or could I just leave it as it is and just pour it straight into soaked grains/pasteurized substrate? How much gypsum would I need to prepare 7 quarts of oats and a brick/2qt verm substrate?



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OfflineCootermonkey
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Re: Is this the right kind of gypsum? [Re: ouuwee]
    #26602133 - 04/15/20 05:43 AM (3 years, 9 months ago)

I just hit search posts and typed pelletized gypsum. Hit trusted cultivator then put 3 years for thread age
https://www.shroomery.org/forums/showflat.php/Number/26103152#26103152
Hope it helps


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Offlineouuwee
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Re: Is this the right kind of gypsum? [Re: Cootermonkey]
    #26602173 - 04/15/20 06:26 AM (3 years, 9 months ago)

Quote:

Cootermonkey said:
I just hit search posts and typed pelletized gypsum. Hit trusted cultivator then put 3 years for thread age
https://www.shroomery.org/forums/showflat.php/Number/26103152#26103152
Hope it helps




I appreciate it but there are also many people who uses it frequently in their grows with success vs the opinion of 1 person. I know gypsum is optional, but at this $5 price point, it's worthwhile for me to experiment with it and see if it improves anything.


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InvisibleHtaeh
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Re: Is this the right kind of gypsum? [Re: ouuwee]
    #26602244 - 04/15/20 07:23 AM (3 years, 9 months ago)

I use gypsum, mine is not powder but the pellet form and I just throw it in, brf or whatever but it doesn't need very much at all as far as I'm aware. My gypsum says this: Calcium sulphate 55% SO3, 28% Ca.


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Offlineouuwee
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Re: Is this the right kind of gypsum? [Re: Htaeh]
    #26604991 - 04/16/20 06:55 AM (3 years, 9 months ago)

Still need opinions on whether this specific gypsum is the right kind, I appreciate it!


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OfflinePiggyPig
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Re: Is this the right kind of gypsum? [Re: ouuwee]
    #26605011 - 04/16/20 07:07 AM (3 years, 9 months ago)

I gave this stuff a try once upon a time and had nothing but bad luck while using it. I think the sulfur may be an issue, but am not sure about this. I now use the lab grade gypsum in the mylar bags. It looks pure white and the powder is very fine. I am also experimenting with plaster of paris from the hardware store. I am trying to phase it in as a more cost effective alternative to gypsum that I am not forced to order online.


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OfflineBrian Jones
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Re: Is this the right kind of gypsum? [Re: ouuwee]
    #26605036 - 04/16/20 07:32 AM (3 years, 9 months ago)

I think what you have is fine. I use garden gypsum from Menards. Use a small handful with the coir before you hydrate it. You don't have to crush it. I put the gypsum in a 5 gallon bucket first then the dried coir over it. Add the boiling water and cover it and wait a while. When you mix the coir up the gypsum will be dissolved and unnoticeable.


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