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smkpt
Stranger


Registered: 04/21/07
Posts: 268
Loc: Oregon
Last seen: 2 years, 8 months
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Gypsum?
#7598998 - 11/05/07 03:43 PM (16 years, 2 months ago) |
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ok well im going to do a monotub. im going to start by making some LC, then inoc. my WBS then im going to spawn my WBS to coir. what i want to know is do i need this? and can i buy it at a store and not have to crush it up myself?
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 3 days
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Re: Gypsum? [Re: smkpt]
#7599004 - 11/05/07 03:45 PM (16 years, 2 months ago) |
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Garden gypsum is available at every nursery I've ever stepped foot into. Many growers skip it, but performance and disease resistance are higher if it's used. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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smkpt
Stranger


Registered: 04/21/07
Posts: 268
Loc: Oregon
Last seen: 2 years, 8 months
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thanks RR, so if i dont get it and i just spawn WBS to coir and coffe grounds ill be good?
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mycocurious
Mike O. Kuerias



Registered: 02/09/07
Posts: 1,265
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Re: Gypsum? [Re: smkpt]
#7601757 - 11/06/07 09:24 AM (16 years, 2 months ago) |
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Garden Gypsum (which is not the same as plaster) is used during grain soaks (about a tablespoon's worth) and mixed into bulk substrates and casing mixtures (up to 5% by volume) to add a readily incorporable source of calcium and because it helps prevent the grains from clumping.
When mixing it into bulk substrates it is _highly_ recommended you do this while the substrate/casing mixture is dry. In the case of coco-coir this means hydrating/expanding out your brick of coir a day or two in advance allowing it to drain and dry first before adding the gypsum. If added to wet mediums it will immediately clump and become impossible to distribute evenly. It also acts as a very mild buffering agent (a substance that resists a change in pH) for the substrate as well...
--- And for the record, I have a hell of a time finding Garden Gypsum outside of garden nurseries and hydroponics supply stores. I've yet to find it at the mega-retailer's pathetic garden sections...
--------------------
Don't mistake my tone for a "matter-of-fact" attitude. I'm just presenting what I believe to be correct, until I'm corrected... - How Myco-Curious Prepares Coir & Compost Substrates - How Myco-Curious Builds A Bulk Humidifier - How Myco-Curious Builds An Automated Greenhouse ------------------------------------ figgusfiddus said: Keep in mind that inoculating or whatever in front of a flow hood won't help your bad substrate, your bad inoculant, your bad sterile procedure, etc. etc. etc. It's not a +3 flowhood of magic, it's just a tool.
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MotorCityMadman
Rubberfan andFunketeer



Registered: 10/02/06
Posts: 202
Loc: Motown (State of Mind)
Last seen: 14 years, 2 months
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I pasteurize my coir in a pot on the stove...if I wait until the coir is hydrated (basically the contents of the pot are kinda like the consistency of thin oatmeal or something), I can stir in gypsum ok.
I just start stirring and very slowly sprinkle in the gypsum.
good luck.
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