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Mushrooms, Mycology and Psychedelics > Advanced Mycology
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Re: Gypsum
    #84406 -

o.k. if your innoculant is dried out, it may or may not recover, depends how dried out it is. Chances are not great, but it may work. For gypsum, it is not usualy added to grain, it is a pH buffer to bring down acidity, but is normally added to casing soil mixes. I think you mean CaCO3, calcium carbonate, which is pure crushed oyster shell (buy tablets at the store) or chalk will work fine too. Make sure to powder it, I use a coffee grinder which works great. You add this to the grain before the sterilization of the jars.

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Re: Gypsum
    #84408 -

That is what it says it is on the bag calcium carbonate.

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Re: Gypsum
    #84409 -

Same thing. People also have been known to use gypsum, with good results, to prevent sticking of grains when using rye, etc.


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"The universe does a math equation that never even ever really is anywhere in it, and if it spouts out creation, we're on the tip of its tongue, and it asks us where we stand." -- Modest Mouse

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Re: Gypsum
    #84410 -

Gypsum is Calcium Sulfate CaSO4 (not Carbonate!!) and is used in the mushroom culture to prevent sticking of the grains and to suply some minerals to the fungus.


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Grow Mushrooms from Spores - PF-Tek for Simple Minds

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Re: Gypsum
    #84411 -

..and gypsum will not make it more basic...

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Re: Gypsum
    #84412 -

Sorry, my bad. Amazing how much chemistry you can forget at 4 in the morning.


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"The universe does a math equation that never even ever really is anywhere in it, and if it spouts out creation, we're on the tip of its tongue, and it asks us where we stand." -- Modest Mouse

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Re: Gypsum
    #84413 -

Calcium Sulfate, strong acid/weak base = fairly acidic action.

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Re: Gypsum
    #84414 -

Ok, now I'm confused. Calcium sulfate will or will not affect the pH? Last time I was mixing up casing material, I experimented with adding garden lime to one glass of water and gypsum to another. I dissolved them as best I could and tested the pH. The glass with the gypsum read as neutral, and the glass with the lime read as very basic. If Calcium sulfate is so acidic, why didn't my results reflect this? :confused:

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"Not all drugs are good... some are great."


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Mushrooms, Mycology and Psychedelics > Advanced Mycology
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