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North Spore Shop: North Spore Mushroom Grow Kits & Cultivation Supplies

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Such a thing as too much gypsum in WBS jars?
    #1294864 -

I might have put too much gypsum in some jars of WBS I was making for spawn.

I was following (I think) Annos advice of adding a "knife tip" of gypsum to the jars.
I didnt know if this was a metric knife tip, or an imperial knife tip. The only knife I had around happened to be a broadsword, so that ended up being quite a knife tip full ofgypsum. And I dont know if it was a metric broadsword, or a Canadian broadsword.

After taking the jars out of the PC, they sure did shake up real nice and the WBS didnt clunp together, but there is a noticable whitish haze from the gypsum smeared on the inside of the jars.

My mani question is will too much gypsum do any harm? Or will it just be kind of a nuisence when checking for mycelium growth?

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Re: Such a thing as too much gypsum in WBS jars? [Re: KingCobWeb]
    #1294869 -

>My mani question is will too much gypsum do any harm?

IME, no.


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Grow Mushrooms from Spores - PF-Tek for Simple Minds

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Re: Such a thing as too much gypsum in WBS jars? [Re: Anno]
    #1294882 -

Quote:
>My mani question is will too much gypsum do any harm?

IME, no.


But what is the conversion between a metric knife tip and an imperial knife tip?


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Re: Such a thing as too much gypsum in WBS jars? [Re: KingCobWeb]
    #1294896 -

1.37


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Grow Mushrooms from Spores - PF-Tek for Simple Minds

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Re: Such a thing as too much gypsum in WBS jars? [Re: Anno]
    #1294902 -

hmmm, gypsum (CaSo4): I asked around in quite a few shops, and was met with blank looks. "Gypsum is a brand name" was one unhelpful answer i got.

plaster of paris? drywall filling? any other advice (price / packet size / appearance etc)?

Thanks to all who reply. Loved your time lapse vid btw, anno - i play it repeatedly :laugh:


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buh

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Re: Such a thing as too much gypsum in WBS jars? [Re: shirley knott]
    #1294910 -

Plaster of Paris CaSO4 * 2H2O - A fine white powder composed of calcium sulphate hemihydrate. Plaster of Paris obtained its named because it was primarily prepared from gypsum quarried in the Montmartre district of Paris. It is produced by heating gypsum, alabaster or selenite, which are composed of calcium sulphate dihydrate, to temperatures below 250?C (150? - 160?C) to drive off some of the water of crystallisation. The resulting calcium sulphate hemihydrate is stable in air, but readily combines with water to form a paste that rapidly sets (in approximately 30 minutes) to an impenetrable solid. It generates heat with setting and may expand slightly. When he set is complete the plaster returns to its original size. Setting can be accelerated by the addition a small amounts of salts (aluminium sulphate, potassium sulphate) or retarded by the addition of organic materials (blood, glue, casein). Plaster of Paris has long been used for moulds, sculpture and casts, and for the decoration of walls and ceilings. Because plaster of Paris is pure white and highly porous, the surface is readily soiled and was therefore often coated. Materials such as tea, gum arabic, waxes, shellac, lime wash and oil-based paints have been used as coatings. Plaster of Paris is also frequently painted and oil-gilded. A sealant, such as animal glue, gum arabic or shellac, is applied first to reduce the porosity of the plaster. Distemper and oil-based paints are commonly used. It is a component of alum-gypsum.


Yes, this is the right stuff.


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Grow Mushrooms from Spores - PF-Tek for Simple Minds

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Re: Such a thing as too much gypsum in WBS jars? [Re: Anno]
    #1294924 -

I have found a good way to identify gypsum.

I GO into a lawn and garden store, or the garden dept of megalo mart or Lowes or home depot, and look for the bag that says "gypsum".

There might be some minor differences between garden or hporticultural gypsum and some products that are sold as plaster of paris....such as some of the plasters actually being something else, or having some other ingredients that you might not want.

So read the ingredients.

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Re: Such a thing as too much gypsum in WBS jars? [Re: KingCobWeb]
    #1295521 -

there are alot of differences, wall board and plaster have binders that allow it to come together and bond, where as the horticultural will not....it makes little difference which you use.....I'll get back with more later....

Prisoner#1


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California Has Legalized Child Prostitution

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Re: Such a thing as too much gypsum in WBS jars? [Re: KingCobWeb]
    #5074741 -

KingCobWeb said:
I didnt know if this was a metric knife tip, or an imperial knife tip. The only knife I had around happened to be a broadsword, so that ended up being quite a knife tip full ofgypsum. And I dont know if it was a metric broadsword, or a Canadian broadsword.



LOL!  :lol:

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Re: Such a thing as too much gypsum in WBS jars? [Re: KingCobWeb]
    #10594807 -

I dont mean to necro, but i read "heaping tablespoon" somewhere and used a "heaping tablespoon". Am I fucked?

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Re: Such a thing as too much gypsum in WBS jars? [Re: MisterMuscaria]
    #10594925 -

I use a heaping TB for 8 cups of rye in 3 gallons of water. I guess see what happens. :shrug:


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"Last chance to evacuate planet Earth before it is recycled".


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Re: Such a thing as too much gypsum in WBS jars? [Re: Mysterium Fidei]
    #10594939 -

I used about 4 cups WBS.

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Re: Such a thing as too much gypsum in WBS jars? [Re: MisterMuscaria]
    #10595010 -

4 cups to 1 TB gypsum? Not ideal but they should be fine.


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"Last chance to evacuate planet Earth before it is recycled".


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North Spore Shop: North Spore Mushroom Grow Kits & Cultivation Supplies

Mushrooms, Mycology and Psychedelics > Mushroom Cultivation
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