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#1
07-12-2005, 05:44 AM
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Kalkwasser is Calcium Hydroxide, Limestone is Calcium Carbonate similar to Aragonite (the stuff recommended for substrate) which has a slightly different crystal structure that makes it easier to dissolve at pH's usually found in aquariums (7.8? I think?)
Anyways... Limestone = "Dead" Base Rock  Lime (Kalwasser) = Happy Corals  but if you're not careful, excessive pH  and perhaps the dreaded "calcium precipitate snowstorm"  I'll shut up now.
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New!! 150 gal. wt 2 x 250W 10000K MH & 4 T5 Actinics. 
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