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OfflinefungalEntropy
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Adding gypsum to brf cakes
    #12642295 - 05/27/10 10:21 PM (13 years, 9 months ago)

Ratio for BRF cakes are 2:1:1 verm:water:brf.  What is the ratio for adding gypsum to the substrate mix?

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OfflineChlawre
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Re: Adding gypsum to brf cakes [Re: fungalEntropy]
    #12642312 - 05/27/10 10:23 PM (13 years, 9 months ago)

Like a tablespoon per 5 cakes? Dunno how that works out otherwise, I always make my cake substrate in quantities enough for 5

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Offlineafrosheen
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Re: Adding gypsum to brf cakes [Re: fungalEntropy]
    #12642315 - 05/27/10 10:23 PM (13 years, 9 months ago)

1 tablespoon to 5 cakes is what I've seen before. Seems to work well.


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OfflinefungalEntropy
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Re: Adding gypsum to brf cakes [Re: afrosheen]
    #12642323 - 05/27/10 10:25 PM (13 years, 9 months ago)

Cool thx for the quick response :smile:  Duly noted: 1 tbsp for 5 cake mixture

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Offlinesilas simon
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Re: Adding gypsum to brf cakes [Re: Chlawre]
    #12642346 - 05/27/10 10:27 PM (13 years, 9 months ago)

1 US cup = 8 US fluid ounces
1 US tablespoon = 0.5 US fluid ounces

32:0.5 ratio


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InvisibleJavadog
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Re: Adding gypsum to brf cakes [Re: fungalEntropy]
    #12642367 - 05/27/10 10:30 PM (13 years, 9 months ago)

If I might...I have heard gypsum referred to as a Ph buffer
(and that it supplies minerals needed for fruiting).

So, as opposed to lime, the amount of gypsum (modulo extremes)
should not be the most sensitive factor.

....but I am using a Tablespoon for each five cakes until further notice.  ;0)

P.S. Supporting the other responder: a useful mnemonic:

"A pint's a pound, the world round"  (i.e. 2 cups == 16 ounces)  (Thanks Mom!)


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OfflinePscientist
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Re: Adding gypsum to brf cakes [Re: Javadog]
    #12642462 - 05/27/10 10:42 PM (13 years, 9 months ago)

Quote:

Javadog said:


P.S. Supporting the other responder: a useful mnemonic:

"A pint's a pound, the world round"  (i.e. 2 cups == 16 ounces)  (Thanks Mom!)





That might be true for water, but not all liquids have the same density a pint of butane and a pint of H20 will have vastly different masses , therefore a pint =/= a pound the world around:shrug:


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OfflineRogerRabbitM
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Re: Adding gypsum to brf cakes [Re: Javadog]
    #12643122 - 05/28/10 01:05 AM (13 years, 9 months ago)

Quote:

Javadog said:
If I might...I have heard gypsum referred to as a Ph buffer
(and that it supplies minerals needed for fruiting).





Incorrect on the former, true on the latter.  Gypsum isn't used to adjust pH.
RR


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InvisibleJavadog
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Re: Adding gypsum to brf cakes [Re: RogerRabbit]
    #12643252 - 05/28/10 01:44 AM (13 years, 9 months ago)

Yes. ...but I used "buffer".

Not that this is not complete BS, but IIRC the idea was
that Gypsum has the effect of buffering Ph.

Which in this case, I would take to mean that it makes the Ph
more stable.

...but I get the feeling that I am a tad far afield.


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Offlineruckusman
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Re: Adding gypsum to brf cakes [Re: Javadog]
    #12644528 - 05/28/10 10:32 AM (13 years, 9 months ago)

So Gypsum is a nutrient that has the side effect of changing pH slightly or buffering?

Gypsum can be used in cakes &/or grain spawn?

And hydrated lime is the buffer usually used for bulk substrates

Seems the more I read the less I remember correctly these days

And now I've forgotten the function of calcium carbonate

Edited by ruckusman (05/28/10 10:33 AM)

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OfflineRogerRabbitM
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Re: Adding gypsum to brf cakes [Re: ruckusman]
    #12644599 - 05/28/10 10:47 AM (13 years, 9 months ago)

Quote:


And hydrated lime is the buffer usually used for bulk substrates




No.  don't use lime on substrates.  They're fine the way they are.  Gypsum supplies calcium which by itself would raise pH, and sulfur, which by itself would lower pH.  Working together, they tend to help keep pH stable, while providing essential minerals.

A side benefit of gypsum is it helps prevent grains from clumping.
RR


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InvisibleSgt. Frost
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Re: Adding gypsum to brf cakes [Re: fungalEntropy]
    #12648667 - 05/29/10 01:02 AM (13 years, 9 months ago)

Quote:

fungalEntropy said:
Ratio for BRF cakes are 2:1:1 verm:water:brf.  What is the ratio for adding gypsum to the substrate mix?




Shea25 did an awesome tek using gypsum.

Quote:

Shea25 said:
The basic recipe for 5 PF jars is this 2 parts vermiculite 1 part water and 1 part BRF (additionally you can add 1 tablespoon of gypsum for 5 jars)



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InvisibleShea25
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Re: Adding gypsum to brf cakes [Re: Sgt. Frost]
    #12648853 - 05/29/10 02:19 AM (13 years, 9 months ago)

I find it helps tonnes, it adds calcium and sulfur they help the development of the mushroom,

Gypsum(calcium sulfate dihydrate) is used to boost production, helps keeps grains from sticking,and keeps ph swings down to a minimal, its not used to change the Ph of anything.

Hydrated lime(Calcium hydroxide) is used to change the Ph in CASINGS not bulk to more of a base/alkaline state 7-8PH,

Oyster shell flour(Calcium carbonate) is a long term Ph adjuster by the time it take affect your flushes will be done

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InvisibleJavadog
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Re: Adding gypsum to brf cakes [Re: Shea25]
    #12649606 - 05/29/10 09:12 AM (13 years, 9 months ago)

Hello all,

It occurs to me that I have a gypsum question too.

I bought a relatively large bag of "garden gypsum" and
came to find that it was not entirely a powder.  If has
small (~1-4 mm or so) stones in it.

Should I be buying a mortar and pestle?

Thanks!

JD


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Invisiblewygram
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Re: Adding gypsum to brf cakes [Re: Javadog]
    #12649624 - 05/29/10 09:18 AM (13 years, 9 months ago)

Quote:

Javadog said:
Should I be buying a mortar and pestle?



Nah. This stuff dissolves easily in water. Boil some coffee, strain and mix 50/50 with water, and gypsum. Then use this to hydrate the vermiculite before you slowly add the BRF.


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InvisibleJavadog
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Re: Adding gypsum to brf cakes [Re: wygram]
    #12649662 - 05/29/10 09:28 AM (13 years, 9 months ago)

Quote:

wygram said:
Quote:

Javadog said:
Should I be buying a mortar and pestle?



Nah. This stuff dissolves easily in water. Boil some coffee, strain and mix 50/50 with water, and gypsum. Then use this to hydrate the vermiculite before you slowly add the BRF.




To confirm, the suggestion is to use the coffee liquid not the grounds.

If I am using it to "hydrate the verm" then it must be the former.

Thanks!

P.S. I just noticed that this site's spell checker sees "verm"
as a word.  LOL!


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