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InvisibleLegend
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What are the benefits of gypsum?
    #14712098 - 07/03/11 05:55 PM (13 years, 6 months ago)

I've heard it being used in PF cakes, but never gave it more thought.
I'm curious to know if I should use it, or of it would cause more hamce of contam or just not do well.
I also do not have a pressure cooker, and was just going to boil my jars like in the RR vids.


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Offlineveda_sticks
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Re: What are the benefits of gypsum? [Re: Legend]
    #14712136 - 07/03/11 06:05 PM (13 years, 6 months ago)

I cant remember the exact reason but it adds food benificial to mycelium. Its used by many people in bulk substrates for giving myc all they need to fruit well.

It doesnt add any contamination risk. And steam sterilising will be just fine.

I started of with steam sterilisation, moved to a pressure cooker thinking i was getting contams cause of that and found out it was just poor sterile technik.

I took a break from growing and when i started back didnt have a pressure cooker. Out of 30 jars i only got 2 contams and that was on the last batch i done. when done right combined with good practices steam sterilisation is 99% effective for pf tek.


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OfflineSmirnoff
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Re: What are the benefits of gypsum? [Re: veda_sticks]
    #14712246 - 07/03/11 06:33 PM (13 years, 6 months ago)

I think gypsum is used to ballance the PH in the substrate. but I'm not sure if there are other benefits from it.


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InvisibleShroomismM
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Re: What are the benefits of gypsum? [Re: Legend]
    #14712266 - 07/03/11 06:38 PM (13 years, 6 months ago)

There's several benefits.
The main reason is to add calcium carbonate and sulfur, which helps to stabilize PH levels to near neutral so it acts as a PH buffer as well as adding minerals which are vital for fruiting.
It also helps prevent grains from sticking and clumping.


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InvisibleDoctor_Inoc
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Re: What are the benefits of gypsum? [Re: Legend]
    #14712311 - 07/03/11 06:47 PM (13 years, 6 months ago)

Quote:

legit27 said:
I've heard it being used in PF cakes, but never gave it more thought.
I'm curious to know if I should use it, or of it would cause more hamce of contam or just not do well.
I also do not have a pressure cooker, and was just going to boil my jars like in the RR vids.



Gypsum should ALWAYS be added, whenever possible, (@ 2% by volume for grains and 5% by volume to bulk substrates) to any substrate (including BRF cakes) for all stages of myce. growth. 

The addition of gypsum will NOT increase chances of contamination, being that you don't have a PC and are going to be boiling the cakes to "sterilize" them.

The benefits of adding gypsum to the various substrates of the mushroom culture makes available calcium and sulfur to the mushroom mycelium.  Both are beneficial nutrients for mycelium in all stages of growth.  Adding gypsum, to grains keeps grains from clumping together after sterilization.

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OfflineISOfantastic
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Re: What are the benefits of gypsum? [Re: Doctor_Inoc]
    #14712428 - 07/03/11 07:17 PM (13 years, 6 months ago)

It's more for grains and bulk substrate.
Minimal benefit in pf cakes.
Forget the gypsum, get a pressure cooker.

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Offlineoccollegeboi
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Re: What are the benefits of gypsum? [Re: ISOfantastic]
    #14713265 - 07/03/11 10:47 PM (13 years, 6 months ago)

I just bought a 5 pound bag of organic gypsum from amazon for only 7 bucks.

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Offlinesteelmonkey
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Re: What are the benefits of gypsum? [Re: occollegeboi]
    #14713279 - 07/03/11 10:54 PM (13 years, 6 months ago)

I believe it also helps mycelium to better digest the available nutrients


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Invisibleabltsandwich
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Re: What are the benefits of gypsum? [Re: steelmonkey]
    #14713351 - 07/03/11 11:09 PM (13 years, 6 months ago)

Gypsum adds sterilization to the pressure cooker.  If you PF Tek some bulk substrate and proper sterilization pasteurization, then mushrooms and gas exchange (GE) plus FRESH AIR EXCHANGE (brown rice flower [FAE]).

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Offlinesteelmonkey
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Re: What are the benefits of gypsum? [Re: abltsandwich]
    #14713401 - 07/03/11 11:18 PM (13 years, 6 months ago)

Quote:

abltsandwich said:
Gypsum adds sterilization to the pressure cooker.  If you PF Tek some bulk substrate and proper sterilization pasteurization, then mushrooms and gas exchange (GE) plus FRESH AIR EXCHANGE (brown rice flower [FAE]).




what? care to explain that?


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OfflineISOfantastic
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Re: What are the benefits of gypsum? [Re: abltsandwich]
    #14713428 - 07/03/11 11:24 PM (13 years, 6 months ago)

Quote:

abltsandwich said:
Gypsum adds sterilization to the pressure cooker.  If you PF Tek some bulk substrate and proper sterilization pasteurization, then mushrooms and gas exchange (GE) plus FRESH AIR EXCHANGE (brown rice flower [FAE]).




:awewtf:

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Offlinenixon
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Re: What are the benefits of gypsum? [Re: abltsandwich]
    #14713561 - 07/03/11 11:52 PM (13 years, 6 months ago)

Quote:

abltsandwich said:
Gypsum adds sterilization to the pressure cooker.  If you PF Tek some bulk substrate and proper sterilization pasteurization, then mushrooms and gas exchange (GE) plus FRESH AIR EXCHANGE (brown rice flower [FAE]).




brown rice flower


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masspan said:
in your 2nd pic that mushroom is actively standing on its head for sure

nearhorn said:
what does that mean? its active?

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Offlinesage1o1
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Re: What are the benefits of gypsum? [Re: abltsandwich]
    #14713707 - 07/04/11 12:31 AM (13 years, 6 months ago)

Quote:

abltsandwich said:
Gypsum adds sterilization to the pressure cooker.  If you PF Tek some bulk substrate and proper sterilization pasteurization, then mushrooms and gas exchange (GE) plus FRESH AIR EXCHANGE (brown rice flower [FAE]).





What do you mean when you say, adds sterilization to the pressure cooker?  I don't think it has anything to do with the sterilization process, actually, I almost certain it doesn't. 

I don't mean to be rude but your next sentence is even more confusing. You PF Tek some bulk.. what does that mean?  Plus the rest of sentence is just completely unintelligible.


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Edited by sage1o1 (07/04/11 12:47 AM)

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Offlinesteelmonkey
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Re: What are the benefits of gypsum? [Re: nixon]
    #14713791 - 07/04/11 12:51 AM (13 years, 6 months ago)

Quote:

nixon said:
Quote:

abltsandwich said:
Gypsum adds sterilization to the pressure cooker.  If you PF Tek some bulk substrate and proper sterilization pasteurization, then mushrooms and gas exchange (GE) plus FRESH AIR EXCHANGE (brown rice flower [FAE]).




brown rice flower




Believe it or not I just now got that....


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OfflineoONoodlesOo
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Re: What are the benefits of gypsum? [Re: steelmonkey]
    #14713933 - 07/04/11 01:30 AM (13 years, 6 months ago)

I always wondered what this was used for, this thread answered some questions I had, thanks


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Offlinenixon
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Re: What are the benefits of gypsum? [Re: steelmonkey]
    #14714044 - 07/04/11 02:18 AM (13 years, 6 months ago)

Quote:

steelmonkey said:
Believe it or not I just now got that....




:laugh2:


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masspan said:
in your 2nd pic that mushroom is actively standing on its head for sure

nearhorn said:
what does that mean? its active?

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OfflineSB-2
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Re: What are the benefits of gypsum? [Re: ISOfantastic]
    #14714088 - 07/04/11 02:51 AM (13 years, 6 months ago)

Quote:

ISOfantastic said:
Quote:

abltsandwich said:
Gypsum adds sterilization to the pressure cooker.  If you PF Tek some bulk substrate and proper sterilization pasteurization, then mushrooms and gas exchange (GE) plus FRESH AIR EXCHANGE (brown rice flower [FAE]).




:awewtf:




:awewtf: X 2


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Invisiblebbox244
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Re: What are the benefits of gypsum? [Re: SB-2]
    #14714174 - 07/04/11 03:34 AM (13 years, 6 months ago)

Uh ok.  Just to clarify a few things which are incorrect in the replies in this post.  Gypsum is a PH neutral salt.  When added to a substrate it provides calcium and sulphur, which is a beneficial nutrient to mushrooms.  It IS PH Neutral, it is NOT basic, thus it is NOT a PH buffer.  Granted, in some agricultural conditions, it may become acidic or basic, depending on soil conditions, but for our purposes, it's neutral.  I wanted to clarify that since PH buffering is very important, and gypsum is not a buffer.  If anything, I would think the sulphur in Gypsum would perhaps make the substrate more acidic over time, because of the CA SO4 separation, but, I'm not 100% on that one, never tested it.
  A bit on PH/Gypsum: Mycelium prefers more acidic conditions.  So a more acidic substrate will colonize faster, however, it will be more susceptible to contams as well.  So for gypsum use in BRF cakes, you will actually have longer cake survival because of the nutrient addition, however, do not use too much in cakes,  I would just add perhaps 1/2 teaspoon per half-pint.  Mushrooms lower the PH of their substrates as they grow, thus SMS has an inherently low PH.  So if you want to buffer, I would buffer the cakes close to 6.4-6.8.  My cakes which have been fruiting for over 2 months were buffered with lime/coffee and I started with a bit of a higher PH, 6.5, so that they would fruit longer, rather than a lower PH.  Colonization times were longer, but they've been fruiting for over 2 months now, contam free.  I should also mention I use (un-necessary, just my OCD) HEPA filtered air for FAE.  The main additive in my BRF cakes was bee pollen and a few other partial additives.  The actual formula is in one of my posts, about 2-3 weeks ago the cakes got dry and I had weird pigment changes in the caps.  Fixed, with a dunk, the formula is in that post. 

Gypsum is a great all around additive, it is tremendous for grains and bulk substrates, it really helps reduce clumping.  Plus, as a nutrient, you can't go wrong with gypsum.  It is fine for any  mushroom substrate.

If you continue forward, you will find Gypsum essential with grains.  Good luck!


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Re: What are the benefits of gypsum? [Re: abltsandwich]
    #14714194 - 07/04/11 03:47 AM (13 years, 6 months ago)

Quote:

abltsandwich said:
Gypsum adds sterilization to the pressure cooker.  If you PF Tek some bulk substrate and proper sterilization pasteurization, then mushrooms and gas exchange (GE) plus FRESH AIR EXCHANGE (brown rice flower [FAE]).




I lol'd so hard.

Quick question though - how much gypsum should i add to my 1qt 3/4 full wbs jar before PC'ing?


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OfflineISOfantastic
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Re: What are the benefits of gypsum? [Re: disco-biscuit]
    #14714230 - 07/04/11 04:19 AM (13 years, 6 months ago)

Quote:

disco-biscuit said:
I lol'd so hard.

Quick question though - how much gypsum should i add to my 1qt 3/4 full wbs jar before PC'ing?




I usually add tablespoon or two to the soak water for a batch of 12 jars, any kind of grain.

Quote:

abltsandwich said:
Gypsum adds sterilization to the pressure cooker.  If you PF Tek some bulk substrate and proper sterilization pasteurization, then mushrooms and gas exchange (GE) plus FRESH AIR EXCHANGE (brown rice flower [FAE]).




I had to make that post my sig.  Hope you don't mind BLT.

:laugh2:

Edited by ISOfantastic (07/04/11 04:45 AM)

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