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MegaGoomba
1UPer



Registered: 07/24/10
Posts: 241
Last seen: 6 years, 4 months
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Great source of gypsum Chalk
#14515319 - 05/26/11 01:20 PM (12 years, 8 months ago) |
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Did you know you can get gypsum at the grocery in the form of chalk.

You need Chalk white (chalkboard variety) and For the easy way coffee grinder or for the hard way a hammer, a thick plastic bag two magazines
I use one stick of chalk for 5 PF jars. The easy way to prepare the chalk is to put it into a coffee grinder and pulse until you have a fine powder.
The hard way is to set up on a hard surface that wont move while your hammering. first put down one magazine, then the plastic bag with chalk inside and finally put the next magazine on top of the chalk bag. So that you have made a magazine sandwich to keep the bag from ripping. Hit the magazine sandwich with the hammer starting out slowly or you will rip holes in the bag and pound into a fine powder.
After you have powderized it you can add it to PF cakes, LC, and Grains.
-------------------- You buy furniture. You tell yourself, this is the last sofa I will ever need in my life. Buy the sofa, then for a couple years you're satisfied that no matter what goes wrong, at least you've got your sofa issue handled. Then the right set of dishes. Then the perfect bed. The drapes. The rug. Then you're trapped in your lovely nest, and the things you used to own, now they own you. Chuck Palahniuk My First Grow My Strain List
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RogerRabbit
Bans for Pleasure



Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 11 months, 4 days
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Re: Great source of gypsum Chalk [Re: MegaGoomba]
#14515340 - 05/26/11 01:25 PM (12 years, 8 months ago) |
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Gosh, that's got to be about 1000 times the price of agricultural gypsum. I get 80 pound bags of finely ground gypsum flour for $8. 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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Luger0815
noob


Registered: 12/21/10
Posts: 1,677
Loc: @ Home
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Re: Great source of gypsum Chalk [Re: RogerRabbit]
#14515361 - 05/26/11 01:31 PM (12 years, 8 months ago) |
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MegaGoomba
1UPer



Registered: 07/24/10
Posts: 241
Last seen: 6 years, 4 months
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Re: Great source of gypsum Chalk [Re: RogerRabbit]
#14515388 - 05/26/11 01:36 PM (12 years, 8 months ago) |
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Quote:
I get 80 pound bags of finely ground gypsum flour for $8.
The idea is more for first time PF teker than someone who wants to have an 80 pound bag of gypsum laying around. If you are going to be growing a lot of mushrooms then you are right it is a waste of money buying bulk will always be cheaper. I think an 80lbs bag is a big commitment and this would be good for someone who hasn't yet been bit by the mycology bug.
-------------------- You buy furniture. You tell yourself, this is the last sofa I will ever need in my life. Buy the sofa, then for a couple years you're satisfied that no matter what goes wrong, at least you've got your sofa issue handled. Then the right set of dishes. Then the perfect bed. The drapes. The rug. Then you're trapped in your lovely nest, and the things you used to own, now they own you. Chuck Palahniuk My First Grow My Strain List
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bootster


Registered: 02/22/11
Posts: 1,531
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Re: Great source of gypsum Chalk [Re: MegaGoomba]
#14515825 - 05/26/11 02:59 PM (12 years, 8 months ago) |
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Go to a home supply store and they have strips of drywall used to separate items for forklift tongs that you can get for free.
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quebus
Stranger

Registered: 05/01/10
Posts: 678
Last seen: 2 months, 23 days
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Re: Great source of gypsum Chalk [Re: MegaGoomba]
#14516029 - 05/26/11 03:43 PM (12 years, 8 months ago) |
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Interesting source. All of the garden supply stores here have pelletized gypsum which I simply wet, dissolve and add to whatever I need (soak or substrate). I did find a bag of powdered gypsum at Worm's Way (which also sells coir bricks).
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