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Unread 12/05/2017, 06:46 PM   #6
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 88,616
From your description, it sounds as if the water got cloudy after you added the calcium. So that might be calcium carbonate precipitation. If the dose was fairly large, adding it to the main tank might be safer. If the sump calcium level (or alkalinity level) gets high enough, calcium carbonate will start precipitating. Adding the mix to a larger volume of water can help.


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Jonathan Bertoni
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