Will this gypsum at Home Depot work for Ca supp.? - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 06-09-2011, 03:59 AM Thread Starter
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Will this gypsum at Home Depot work for Ca supp.?

Will this work?
http://www.homedepot.com/h_d1/N-5yc1...atalogId=10053

it has silicates in it though...anyone know where to buy this that does not have silicates or is this in all gypsum?
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post #2 of 10 (permalink) Old 06-09-2011, 04:43 PM
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I use plaster of paris. It as a small amount if silicates in it too.
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post #3 of 10 (permalink) Old 06-09-2011, 04:45 PM
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Would the GH booster do the job?

How about Calcium Sulfate? http://www.greenleafaquariums.com/aq...m-sulfate.html


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post #4 of 10 (permalink) Old 06-09-2011, 05:00 PM
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I know plaster of paris is CaSO4 with some silicates
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post #5 of 10 (permalink) Old 06-10-2011, 12:52 AM Thread Starter
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I have found a solution. Upon reading the MSDS of both products i have found this...
Gypsum has the composition of:
90-100% CaSO4 (why its not 99-100% is do not know)
0.1-1.0% silica.
The Plaster of Paris has the composition of:
15-25% CaCO3,
25-85% CaSO4 and
0.0-1.0% silica.

The conclusion to my findings is if you are looking to increase the kH and Ca content then use the Plaster of Paris. However if your looking to increase just your Ca then use Gypsum.

Hope this helps...
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post #6 of 10 (permalink) Old 06-13-2011, 07:46 PM
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Quote:
Originally Posted by aquadoc View Post
The conclusion to my findings is if you are looking to increase the kH and Ca content then use the Plaster of Paris. However if your looking to increase just your Ca then use Gypsum.
Did it actually work though? Not everything in theory works as planned in nature, thus I ask.
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post #7 of 10 (permalink) Old 06-15-2011, 01:08 AM
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isnt gypsum a natural flocculant? it should clear up your water at least if nothing else
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post #8 of 10 (permalink) Old 06-15-2011, 01:52 AM
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The only thing you have to worry about is if the gypsum is contaminated with industrial chemicals.

Last year the bad Chinese gypsum boards had to be thrown out because of toxic chemicals or mold in it were found.


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post #9 of 10 (permalink) Old 06-15-2011, 03:03 AM Thread Starter
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Originally Posted by Hilde View Post
Did it actually work though? Not everything in theory works as planned in nature, thus I ask.
I think it might be too early to tell whether this is working or not. In another week or so i will post an update to see if it fixed the calcium deficiency. I almost completely uprooted all my plants and rearrange my hardscape to a different more appealing arrangement so i will have to let them settle a bit. I can say that my water hardness has not increased though which is a good thing.
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post #10 of 10 (permalink) Old 06-15-2011, 03:26 AM Thread Starter
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The only thing you have to worry about is if the gypsum is contaminated with industrial chemicals.

Last year the bad Chinese gypsum boards had to be thrown out because of toxic chemicals or mold in it were found.
This would be valid if i was using gypsum board. However this is not gypsum board and is different. People get gypsum confused with the popular gypsum board (drywall) but gypsum is really a term that means hydrated calcium sulfate, a mineral. This is the main building block to make drywall but many other harmful chemicals are added to form what is called drywall. Here is a quote from wiki in regards to the manufacturing of it:

"The plaster is mixed with fiber (typically paper and/or fiberglass), plasticizer, foaming agent, finely ground gypsum crystal as an accelerator, EDTA, starch or other chelate as a retarder, various additives that may increase mildew and/or fire resistance (fiberglass or vermiculite), wax emulsion or silanes for lower water absorption and water."

I do not know why they call it "gypsum board" but as you can see they shouldn't be. It should be called "Carcinoginic board".

The substance that i am using, gypsum, is ground gypsum with no additives.
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