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OfflineHugofly
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Doubt about Gypsum - Calcium sulfate
    #24022630 - 01/19/17 10:54 AM (7 years, 11 days ago)

Greetings,

First of all, I didn't know where to post this topic, so here it goes!

Im new here and i will start to culticale edible mushrooms and i have a doubt about the Gypsum.

In my country (Portugal) is very hard to find gypsum and i only could find one that it says:

Calcium sulfate >90%

Is this correct to use as gypsum?
Thank you!


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Offlinexzylocybin
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Re: Doubt about Gypsum - Calcium sulfate [Re: Hugofly]
    #24022649 - 01/19/17 10:59 AM (7 years, 11 days ago)

Food grade is best but you can also use the interior of drywall

calcium sulfate is gypsum


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OfflineHugofly
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Re: Doubt about Gypsum - Calcium sulfate [Re: xzylocybin]
    #24022737 - 01/19/17 11:42 AM (7 years, 11 days ago)

Thank you for your reply.
So the interior of drywall is what i bought.. i guess.
What i bought is to put on walls.


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OfflineAlCapone2k
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Re: Doubt about Gypsum - Calcium sulfate [Re: Hugofly]
    #24022756 - 01/19/17 11:52 AM (7 years, 11 days ago)

Actually I can't imagine that you can't get food grade gypsum?!

Have you tried in a pharmacy / Laboratory store?


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OfflineHugofly
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Re: Doubt about Gypsum - Calcium sulfate [Re: AlCapone2k]
    #24022773 - 01/19/17 12:03 PM (7 years, 11 days ago)

Yes, I already called to all pharmacies, agriculture/garden suppliers here in my city and none has and the supplier of them doesn't have anymore.

My question is if this <90% gypsum is enough to produce.. since I cannot find 100% gypsum here :frown:
The label says only that, so I assume that there's no other composts inside.

Its powder and it's white as snow :smile:


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OfflineAlCapone2k
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Re: Doubt about Gypsum - Calcium sulfate [Re: Hugofly]
    #24022784 - 01/19/17 12:07 PM (7 years, 11 days ago)

Yeah, it should be fine, but before you throw all your eggs in one basket, try the internet. You will find normal food grade gypsum for sure, at least in spain or shipped from germany.


Regards.


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InvisiblebodhisattaMDiscordReddit
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Re: Doubt about Gypsum - Calcium sulfate [Re: AlCapone2k]
    #24022787 - 01/19/17 12:08 PM (7 years, 11 days ago)

I haven't used gypsum in ages. if it's a pain in the ass to find it's not worth the hassle. buy it if it's cheap and easy to obtain


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InvisibleAndyHinton


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Re: Doubt about Gypsum - Calcium sulfate [Re: Hugofly]
    #24022818 - 01/19/17 12:23 PM (7 years, 11 days ago)

Update: Reached 50 posts.


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Edited by AndyHinton (01/26/17 09:35 AM)


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InvisiblebodhisattaMDiscordReddit
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Re: Doubt about Gypsum - Calcium sulfate [Re: AndyHinton]
    #24022823 - 01/19/17 12:25 PM (7 years, 11 days ago)

That's used for casing layers and chemical pasteurization. It's no substitute for gypsum


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InvisibleMycolorado
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Re: Doubt about Gypsum - Calcium sulfate [Re: bodhisatta]
    #24022826 - 01/19/17 12:26 PM (7 years, 11 days ago)

Quote:

bodhisatta said:
That's used for casing layers and chemical pasteurization. It's no substitute for gypsum




Beat me to it.  Thanks for clarifying...seems to be a lot of half-assedincorrect info flying around here today.


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Edited by Mycolorado (01/19/17 12:27 PM)


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InvisibleAndyHinton


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Re: Doubt about Gypsum - Calcium sulfate [Re: bodhisatta]
    #24022857 - 01/19/17 12:44 PM (7 years, 11 days ago)

Update: Reached 50 posts.


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Edited by AndyHinton (01/26/17 09:35 AM)


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Re: Doubt about Gypsum - Calcium sulfate [Re: AndyHinton]
    #24022864 - 01/19/17 12:47 PM (7 years, 11 days ago)

gypsum doesn't do anything to the PH and it doesn't buffer much either
lime does a lot to ph and it buffers

distilled water is for lead acid batteries and spore syringes only


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InvisibleAndyHinton


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Re: Doubt about Gypsum - Calcium sulfate [Re: bodhisatta]
    #24022884 - 01/19/17 12:54 PM (7 years, 11 days ago)

Update: Reached 50 posts.


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Edited by AndyHinton (01/26/17 09:34 AM)


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Offlinexzylocybin
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Re: Doubt about Gypsum - Calcium sulfate [Re: AndyHinton]
    #24023314 - 01/19/17 04:03 PM (7 years, 11 days ago)

you van find it at specialty health food stores sometimes, and Asian markets. It is used to make tofu


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InvisibleMad Season
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Re: Doubt about Gypsum - Calcium sulfate [Re: AndyHinton]
    #24023840 - 01/19/17 07:08 PM (7 years, 11 days ago)

Quote:

AndyHinton said:
Maybe we're confusing agricultural lime (calcium carbonate) with hydrated lime (calcium hydroxide)? Wikipedia's article on the former says:

Quote:

Agricultural lime, also called aglime, agricultural limestone, garden lime or liming, is a soil additive made from pulverized limestone or chalk. The primary active component is calcium carbonate...

Other forms of lime have common applications in agriculture and gardening, including dolomitic lime and hydrated lime... In livestock farming, hydrated lime can be used as a disinfectant measure, producing a dry and alkaline environment in which bacteria do not readily multiply.




Hopefully someone who's actually educated in inorganic chemistry can weigh in, and explain it like we're in AP chemistry (the limit of my education in that field).

I fail to see why gypsum would perform any better or worse in compost substrates than garden lime, chalk, baking soda, crushed seashells, or any similar substance.



Because it doesn't burn the substrates due to high pH (or as the quote says, a dry and high alkaline environment). Calcium carbonate is still 9+ pH while gypsum maintain the substrate at a neutral pH. Mycelium can tolerate small amounts, but go overboard and it will do just as bad as anything else you try putting on it. I honestly fail to see the difference gypsum does regardless of if it's in or not anyways, kinda like bod. I constantly forget adding it and shrug because whatever lol


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Edited by Mad Season (01/19/17 07:13 PM)


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InvisibleAndyHinton


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Re: Doubt about Gypsum - Calcium sulfate [Re: Mad Season]
    #24024008 - 01/19/17 07:59 PM (7 years, 11 days ago)

Update: Reached 50 posts.


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Edited by AndyHinton (01/26/17 09:32 AM)


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OfflineHugofly
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Re: Doubt about Gypsum - Calcium sulfate [Re: AndyHinton]
    #24024725 - 01/20/17 04:16 AM (7 years, 10 days ago)

Thank you for that discussion, it really helps me.

I will try my first grow with the "gypsum" that i have, but i have a doubt:

Since is not 100% Calcium sulfate, how much should i use to my wheat grain? and should i use lime to?
I know its two different things, but at the moment i have so much info that i don't know if water + wheat grain + gypsum >90% will change the ph.
PS: I know that gyps doesn't change ph but since this one is "a kind of gyps" i don“t know..
Im so confused! :confused: :confused: :confused: :confused:


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Offlinewtfcrazymofo
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Re: Doubt about Gypsum - Calcium sulfate [Re: Hugofly]
    #24024809 - 01/20/17 06:27 AM (7 years, 10 days ago)

Drywall gypsum might have anti-fungals.  You don't need gypsum.


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Re: Doubt about Gypsum - Calcium sulfate [Re: wtfcrazymofo]
    #24024880 - 01/20/17 07:38 AM (7 years, 10 days ago)

Id rather have made more mushrooms in the time I was worried about gypsum


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InvisibleMad Season
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Re: Doubt about Gypsum - Calcium sulfate [Re: bodhisatta]
    #24024888 - 01/20/17 07:42 AM (7 years, 10 days ago)

It's a fuckin mineral found in extreme excess on our planet. Right up there with salt/halite. Shouldn't really be that hard to find

If it's drywall, whatever it will work. Drywall is like always advertised as antifungal anyways.

Just toss it in, or don't. Or do both and compare results, but if you do it with MS, correlation will NEVER be causation.


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