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GreenRabbit
Plutonium Pollinator



Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 2 years, 3 months
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Gypsum: Did I get the right kinds? How much to add?
#21789744 - 06/10/15 06:48 PM (8 years, 7 months ago) |
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I am making a monotub using 5 pf cakes. So far I've been successful in making monotubs with cakes but have never used gypsum. I just wanted to make sure that this is the right kind and that I am adding an appropriate amount.
For 5 cakes I think half a brick of coir will work. I just eyeball vermiculite and add it in last. I think a small handful will be fine, does the amount here look reasonable?
I plan to make this a 3" thick and about 10" X 20".

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2shoes
The anti-agar



Registered: 04/07/11
Posts: 3,124
Loc: Not in a SAB
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: GreenRabbit]
#21789770 - 06/10/15 06:53 PM (8 years, 7 months ago) |
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I hear lawn gypsum works..
My gypsum is white and powdered but I paid a lot for mine 
I hear drywall "dust" and plaster of paris after it has hardened and crushed up..
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MonkeyJesusFresco
am i suspended in agar?



Registered: 10/09/12
Posts: 3,306
Loc: South East USA
Last seen: 6 hours, 49 minutes
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: 2shoes]
#21789797 - 06/10/15 06:57 PM (8 years, 7 months ago) |
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Nah, just toss plaster into and mix thoroughly into moistened bulk before pasteurization
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GreenRabbit
Plutonium Pollinator



Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 2 years, 3 months
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: MonkeyJesusFresco]
#21789846 - 06/10/15 07:05 PM (8 years, 7 months ago) |
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Quote:
MonkeyJesusFresco said: Nah, just toss plaster into and mix thoroughly into moistened bulk before pasteurization
What? are you saying don't use this? It was the only kind I could find that wasn't mixed into other fertilizers. Plaster? What do you mean?
This is just Calcium Sulfate. Isn't that the whole point of adding gypsum in the first place?
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MonkeyJesusFresco
am i suspended in agar?



Registered: 10/09/12
Posts: 3,306
Loc: South East USA
Last seen: 6 hours, 49 minutes
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: GreenRabbit]
#21789927 - 06/10/15 07:22 PM (8 years, 7 months ago) |
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ha! nah man, I was just responding to the previous poster; I dunno nuth'n 'bout your type of gypsum;
I use plaster of paris; add it to my pre-moistened bulk then pasteurize
I've never bought straight up gypsum before;
plaster of paris, when wet turns into gypsum. sorry about the miscommunication
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GreenRabbit
Plutonium Pollinator



Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 2 years, 3 months
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: MonkeyJesusFresco]
#21790020 - 06/10/15 07:41 PM (8 years, 7 months ago) |
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Quote:
MonkeyJesusFresco said: ha! nah man, I was just responding to the previous poster; I dunno nuth'n 'bout your type of gypsum;
I use plaster of paris; add it to my pre-moistened bulk then pasteurize
I've never bought straight up gypsum before;
plaster of paris, when wet turns into gypsum. sorry about the miscommunication 
No worries, I'm about to throw it in... I'm not pasteurizing, it seems unnecessary, I've been successful with unpasteurized coir. I have coir/verm ready to go, can anyone confirm the amount?
I set that handful aside, I'm about to throw it in.
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2shoes
The anti-agar



Registered: 04/07/11
Posts: 3,124
Loc: Not in a SAB
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: GreenRabbit]
#21790076 - 06/10/15 07:58 PM (8 years, 7 months ago) |
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I'd say use it and post results 
My guess is that it will work great..
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MonkeyJesusFresco
am i suspended in agar?



Registered: 10/09/12
Posts: 3,306
Loc: South East USA
Last seen: 6 hours, 49 minutes
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: 2shoes]
#21790123 - 06/10/15 08:07 PM (8 years, 7 months ago) |
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5% by volume? es wut eye doo
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ShroominMe
Stranger
Registered: 05/03/15
Posts: 525
Last seen: 8 years, 3 months
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: MonkeyJesusFresco]
#21791270 - 06/11/15 01:00 AM (8 years, 7 months ago) |
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I've used plaster of Paris and powdered selenite with success.
Wikipedia:
Gypsum plaster, or plaster of Paris, is produced by heating gypsum to about 300 °F (150 °C)
CaSO4·2H2O + heat → CaSO4·0.5H2O + 1.5H2O (released as steam). When the dry plaster powder is mixed with water, it re-forms into gypsum
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GreenRabbit
Plutonium Pollinator



Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 2 years, 3 months
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: ShroominMe]
#21792572 - 06/11/15 11:07 AM (8 years, 7 months ago) |
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Are you saying I should cook my pelletized gypsum?
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cronicr



Registered: 08/07/11
Posts: 61,436
Loc: Van Isle
Last seen: 2 years, 8 days
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: GreenRabbit]
#21792574 - 06/11/15 11:07 AM (8 years, 7 months ago) |
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no need to
--------------------
  It doesn't matter what i think of you...all that matters is clean spawn I'm tired do me a favor
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GreenRabbit
Plutonium Pollinator



Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 2 years, 3 months
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: cronicr]
#21792597 - 06/11/15 11:17 AM (8 years, 7 months ago) |
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Yea I didn't think so...
I bought a 50lb bag of this pelletized gypsum... It was the only size they had.
Cron, does the amount I added seem appropriate for a monotub? Also, there are no issues with this pelletized gypsum right?
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Mandarinfish

Registered: 01/27/15
Posts: 1,365
Last seen: 1 year, 2 months
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: GreenRabbit]
#21792684 - 06/11/15 11:44 AM (8 years, 7 months ago) |
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.
Edited by Mandarinfish (07/15/20 10:44 PM)
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PinPornProducer
Buy the ticket, take the ride



Registered: 08/23/14
Posts: 9,981
Loc: Rocky Point R.I
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: GreenRabbit]
#21792725 - 06/11/15 11:58 AM (8 years, 7 months ago) |
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I use the pellet gypsum, works fine
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GreenRabbit
Plutonium Pollinator



Registered: 04/28/13
Posts: 2,667
Loc: In a forest
Last seen: 2 years, 3 months
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Re: Gypsum: Did I get the right kinds? How much to add? [Re: PinPornProducer]
#21792847 - 06/11/15 12:37 PM (8 years, 7 months ago) |
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Quote:
PinPornProducer said: I use the pellet gypsum, works fine
All I wanted to hear I'll post results
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