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03/05/2010, 01:16 PM
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#1 |
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Registered Member
Join Date: Mar 2008
Location: Lakeland, FL
Posts: 586
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Pulverized Limestone?
It is the stuff we use on baseball fields for lines/logos. The bag says pulverized limestone and it is a pure white powder with a chalk like texture. Can this be used as a cheap calcium/alk supplement?
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03/05/2010, 01:22 PM
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#2 |
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RC Mod
 Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 68,814
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That's likely to be calcium carbonate, which is more like sand, and won't do much as a supplement. A very tiny amount of it will dissolve in RO/DI water. You could try dissolving some in water, and testing the pH or alkalinity. Kalk is caustic enough that it'd be unpleasant to encounter as lines on a field.
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Jonathan Bertoni |
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03/08/2010, 09:37 PM
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#3 |
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Registered Member
Join Date: Mar 2008
Location: Lakeland, FL
Posts: 586
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It says non-caustic pulverized limestone on the bag. It seems to dissolve in fw, haven't tried sw or any tests yet.
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03/08/2010, 09:52 PM
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#4 |
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RC Mod
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 68,814
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If it's calcium carbonate, not very much is going to dissolve in fresh water, and virtual none in saltwater:
http://www.advancedaquarist.com/issu...y2002/chem.htm You could check the pH of the solution. Limestone might get up to 9 or so in RO/DI water, but calcium hydroxide should bring it up over 12.
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Jonathan Bertoni |
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03/08/2010, 09:59 PM
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#5 |
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Registered Member
Join Date: Sep 2001
Location: Las Vegas, Nevada
Posts: 128
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Who knows what else you may be adding, not worth the risk imo
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