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Offlinegrowguru
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Gyspum Substitute?
    #11699725 - 12/22/09 02:58 PM (15 years, 29 days ago)

I cannot find gypsum anywhere in my hood? I do have a 10lb bag of hydrated lime though. Can this be substituted for Gypsum? If not, can anybody tell me where they usually get their gypsum from? is there national chains that sell it? i tried, lowes, homedepot and nobody carries it? Please help, this shit is holding me up !


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InvisibleShea25
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Re: Gyspum Substitute? [Re: growguru]
    #11699746 - 12/22/09 03:00 PM (15 years, 29 days ago)

Gypsum and Lime are used for 2 different things. Gypsums is an additive that is used in grains cakes and bulk even casings. All it is, is regular dry wall. Get drywall smash it up separate the paper and grind it into a powder. Lime is used to buffer casings to a Base/alkaline PH to help fend off mold.

Gypsum is also used to help keep grains from sticking it also aids in the development of the fruitbodies

Edited by Shea25 (12/22/09 03:02 PM)

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InvisibleDoc_T
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Re: Gyspum Substitute? [Re: growguru]
    #11699757 - 12/22/09 03:02 PM (15 years, 29 days ago)

I tried lime instead of gypsum in some WBS once. It was interesting, and I totally recommend you try it some day with a small batch.
But no, it's not a substitute for gypsum. Plaster of Paris is the same chemical- if there's a Hobby Lobby around, or something like that, you might be be able to get some like that.
Local garden stores will have it for sure, though. Not the big box stores, the local guys. :thumbup:


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Offlinegrowguru
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Re: Gyspum Substitute? [Re: Shea25]
    #11699773 - 12/22/09 03:04 PM (15 years, 29 days ago)

i know they are used for 2 different things, this is why i asked it it could be substitute because they both have a calcium property. I dont know if chopping up some drywall would be safe to do? can someone give another opinion on that before i start loading up 30 jars.... thanks.


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Offlinegrowguru
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Re: Gyspum Substitute? [Re: Doc_T]
    #11699780 - 12/22/09 03:05 PM (15 years, 29 days ago)

I have tried 10 local garden shops and non of them have it????


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InvisibleShea25
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Re: Gyspum Substitute? [Re: Doc_T]
    #11699784 - 12/22/09 03:05 PM (15 years, 29 days ago)

I would not use Plaster of Paris as a replacement for gypsum

Edited by Shea25 (12/22/09 03:07 PM)

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InvisibleCH HELL
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Re: Gyspum Substitute? [Re: Doc_T]
    #11699798 - 12/22/09 03:08 PM (15 years, 29 days ago)

There are many things with Calcium Sulfate(Gypsum) in them Drywall,  Plaster of Paris,  ?Reptile sand and many more.
Most garden areas, hardware stores, Pet stores will carry some type of Calcium Sulfate.
CH

Edited by CH HELL (12/22/09 03:36 PM)

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InvisibleCH HELL
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Re: Gyspum Substitute? [Re: Shea25]
    #11699823 - 12/22/09 03:11 PM (15 years, 29 days ago)

Quote:

Shea25 said:
I would not use Plaster of Paris as a replacement for gypsum





You can use it but you must first add water and let it set up,  then you can break it up and turn it into powder again.  But you are correct it should not be used straight out of the bag the chemicals added to have it harden could not be good for myc.
CH

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InvisibleDoc_T
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Re: Gyspum Substitute? [Re: growguru]
    #11699827 - 12/22/09 03:11 PM (15 years, 29 days ago)

You can do grains without gypsum.

Quote:

I have tried 10 local garden shops and non of them have it????



I find this terribly hard to believe for two reasons:
1) 10 local garden shops? You must have visited what, five cities?
2) one of them had gypsum. They all probably did, but at least one did. It's near the verm.

Quote:

Calcium Carbonate(Gypsum)



Calcium sulfate.


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Offlinegrowguru
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Re: Gyspum Substitute? [Re: Doc_T]
    #11699919 - 12/22/09 03:24 PM (15 years, 29 days ago)

you calling me a liar Doc T???  i have no reason to bullshit ya! i did find one place that carries the Espoma line of Garden Gypsum.. hopefully this is right. The only downfall is that is is 20 miles away. I live in an area that has over 7 million people in a 100 mile radius. So, to call 10 small garden shops in my area is not out of the question...


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Offlinegrowguru
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Re: Gyspum Substitute? [Re: growguru]
    #11699961 - 12/22/09 03:28 PM (15 years, 29 days ago)

The pet store has a product call Reef builder that is a calcium carbonate based product.. does anybody know of this , and could it be substituted???


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InvisibleCH HELL
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Re: Gyspum Substitute? [Re: Doc_T]
    #11699983 - 12/22/09 03:31 PM (15 years, 29 days ago)

Quote:

Doc_T said:
Quote:

Calcium Carbonate(Gypsum)



Calcium sulfate.


:facepalm:

I haven't slept in 2 days,  that's my excuse..LOL

OP Drywall is fine just crush or boil it to remove the paper.  If you have a Lowes,  Menard's or lumber yard near you they will give you the scraps,  4" x 4' strips they use as dividers.

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Re: Gyspum Substitute? [Re: CH HELL]
    #11699997 - 12/22/09 03:33 PM (15 years, 29 days ago)

Yup thats how I get my free gypsum

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InvisibleCH HELL
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Re: Gyspum Substitute? [Re: growguru]
    #11700008 - 12/22/09 03:35 PM (15 years, 29 days ago)

Quote:

growguru said:
The pet store has a product call Reef builder that is a calcium carbonate based product.. does anybody know of this , and could it be substituted???





Sorry that was my fault gypsum is Calcium Sulfate,  the Cali sands are probably Calcium Carbonate but you could ask the pet store or check the ingredients.
CH

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Re: Gyspum Substitute? [Re: CH HELL]
    #11700066 - 12/22/09 03:44 PM (15 years, 29 days ago)

Quote:

CH HELL said:
Quote:

Shea25 said:
I would not use Plaster of Paris as a replacement for gypsum





You can use it but you must first add water and let it set up,  then you can break it up and turn it into powder again.  But you are correct it should not be used straight out of the bag the chemicals added to have it harden could not be good for myc.
CH




Has anyone tried it straight out of the bag? Because I just made two monotubs and the recomendation i got didn't mention letting it harden and to be recrushed. I just put it straight in there. It's been one week and they're both at about 50-65%. Does anyone know if they're going to fail because of this :frown: ?


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InvisibleCH HELL
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Re: Gyspum Substitute? [Re: beatnicknick]
    #11700103 - 12/22/09 03:49 PM (15 years, 29 days ago)

Quote:

beatnicknick said:
Quote:

CH HELL said:
Quote:

Shea25 said:
I would not use Plaster of Paris as a replacement for gypsum





You can use it but you must first add water and let it set up,  then you can break it up and turn it into powder again.  But you are correct it should not be used straight out of the bag the chemicals added to have it harden could not be good for myc.
CH




Has anyone tried it straight out of the bag? Because I just made two monotubs and the recomendation i got didn't mention letting it harden and to be recrushed. I just put it straight in there. It's been one week and they're both at about 50-65%. Does anyone know if they're going to fail because of this :frown: ?





It probably won't hurt it but I don't think the myc will be able to effectively use it so it wont help much either.

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OfflineRogerRabbitM
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Re: Gyspum Substitute? [Re: beatnicknick]
    #11700148 - 12/22/09 03:55 PM (15 years, 29 days ago)

I'd avoid plaster of paris, but the amount used was probably not enough to make a cast.  Still, garden gypsum is what you want, and don't use lime.  Lime will swing the pH basic, and mycelium prefers an acidic media.

Quite the opposite of the original poster, I live in the least populated county in my state.  The nearest town only has 600 population and is over 20 miles away, but three different places carry gypsum.  The feed store, the hardware store, and the farm co-op.  If the town was big enough to have a nursery, they'd have gypsum too.  When I lived in Seattle, nearly every garden nursery had it.  Big cities also have feed stores for the people who have horses.

Or, as said above you can crush drywall.
RR


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Re: Gyspum Substitute? [Re: RogerRabbit]
    #11700175 - 12/22/09 04:01 PM (15 years, 29 days ago)

I always figured you'd want to make a thin slurry if you were using plaster, then mix that into your water.
But I just get gypsum at the local place.


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Re: Gyspum Substitute? [Re: RogerRabbit]
    #11700182 - 12/22/09 04:02 PM (15 years, 29 days ago)

When all else fails... AMAZON. 

Here

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Offlinebeatnicknick
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Re: Gyspum Substitute? [Re: RogerRabbit]
    #11700193 - 12/22/09 04:05 PM (15 years, 29 days ago)

Quote:

RogerRabbit said:
I'd avoid plaster of paris, but the amount used was probably not enough to make a cast.  Still, garden gypsum is what you want, and don't use lime.  Lime will swing the pH basic, and mycelium prefers an acidic media.

Quite the opposite of the original poster, I live in the least populated county in my state.  The nearest town only has 600 population and is over 20 miles away, but three different places carry gypsum.  The feed store, the hardware store, and the farm co-op.  If the town was big enough to have a nursery, they'd have gypsum too.  When I lived in Seattle, nearly every garden nursery had it.  Big cities also have feed stores for the people who have horses.

Or, as said above you can crush drywall.
RR




Okay so the biggest worry i should have is that the whole thing hardens into a cast? Seeing as the particles were dispersed pretty well in the substrate, i don't think that's in the cards. And also the gypsum that is in plaster of paris is now useless because of the other chemicals??


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