scrabble Posted December 14, 2009 Report Share Posted December 14, 2009 Hi I have some coral in a small tank that while I get my larger tank background siliconed in - but have found that my white coral is going grey-y black in places. I have it in a small 40 litre tank with 3 GAE's and a clown loach. PH is 8.2 ...not sure if this is normal or not? Quote Link to comment Share on other sites More sharing options...
spoon Posted December 14, 2009 Report Share Posted December 14, 2009 the coral will rise the ph up high probably not a problem atm though the grey black could be algae Quote Link to comment Share on other sites More sharing options...
lmsmith Posted December 18, 2009 Report Share Posted December 18, 2009 Hmm, I never liked coral in FW tanks for that very reason. It always looks manky after a while. Maybe try sitting it outside in the sun to bleach it? Quote Link to comment Share on other sites More sharing options...
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