Seachem Black Sand
I'm starting up a new tank and am thinking of going the African Cichlid route. At first I wasn't, and I purchased a larger bag of the Black Sand - I cannot return as I have opened the package and gave it the rinse already.
I realize that there are specific substrate for cichlids such that they keep the water hardness high.
Question is can I make do with the Black Sand that I have, and just get some limestone rocks to keep the water hardness up, or should I maybe invest in Caribsea's African Cichlid substrate...which doesn't appear as black as Seachem's.