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Mushrooms, Mycology and Psychedelics > Advanced Mycology
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InvisibleEgyn
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Registered: 04/24/02
Posts: 58
Possible vermiculite substitute
    #626139 - 05/10/02 06:44 PM (21 years, 6 months ago)

I have had an idea about using hardwood sawdust instead of vermiculite in PF style cakes. The sawdust would be soaked in honey water (or some other high sugar item) for one to two days. After this it would be strained and mixed with BRF. I do not think much extra water would need to be added. Cover the substrate with sand of similar coarseness as the vermiculite normally used. This would be pressure cooked for 1.5 to 2 hours and innoculated as normal with a woodloving species. I have not tried this yet and was wanting some input.



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Invisiblestrang

Registered: 04/23/01
Posts: 671
Re: Possible vermiculite substitute [Re: Egyn]
    #626147 - 05/10/02 07:01 PM (21 years, 6 months ago)

seems like it would make mush...vermiculite is airy even when wet unlike sawdust...dunno, just my guess...


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OfflineChromeCrow
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Re: Possible vermiculite substitute [Re: Egyn]
    #626169 - 05/10/02 07:58 PM (21 years, 6 months ago)

hmmmmmmmmmmm, try it, but one suggestion, dont soak it in honey water, or anything sugary, this will either make it sticky, or caramelize in steralizing. if i tried it, i would soak it in plain distilled water.......


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Offlinegoldtop
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Registered: 07/28/01
Posts: 115
Loc: Sydney, Australia
Last seen: 18 years, 5 months
Re: Possible vermiculite substitute [Re: Egyn]
    #626215 - 05/10/02 09:34 PM (21 years, 6 months ago)

I'm currently trying coarse sand instead of vermiculite.

So far, so good, although mycelium growth is slow.

I will post pictures soon, comparing sand with mycelium



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InvisibleEgyn
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Registered: 04/24/02
Posts: 58
Re: Possible vermiculite substitute [Re: ChromeCrow]
    #626391 - 05/11/02 03:03 AM (21 years, 6 months ago)

The idea for soaking the sawdust came from the rapid cultivation system that Stamets talks about for reishi (my next project) in GGMM on page 358. In his formula, 50/50 sawdust/chips are soaked in molasses water for three to four days then loaded and sterized at 15 psi for two hours. Based on this, I think there would be minimal carmelization of the sugars present. Loosely filled into the jars should allow for air flow through the substrate. The other possiblity would be to use rye berries in the mix instead of BRF.


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Offlinecanid
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Re: Possible vermiculite substitute [Re: goldtop]
    #627181 - 05/11/02 08:54 PM (21 years, 6 months ago)

goldtop, so are you just using the sand as filler so as to use less substrate? do you dunk? i'll look foreward to the compason, good luck.


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OfflineMAIA
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Re: Possible vermiculite substitute [Re: Egyn]
    #628717 - 05/13/02 05:38 AM (21 years, 6 months ago)

I have sucessufuly tested granulated cork as a substitute for verm. The cork is soaked in boiling water for 20 minutes, then it's let to rest 8-12 hours and strained, mixed with BRF and sterilized. BTW, you can do your own granulated cork with normal cork blocks.

Peace,
MAIA


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Mushrooms, Mycology and Psychedelics > Advanced Mycology
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