I'm starting a 75 gallon mbuna tank. My ph is 8.0-8.2, gh 14-15, kh 8-9. If i add crushed coral would that be a good or a bad thing or am i better off just leaving it alone. I dont want my paramaters to be changing all the time i like to keep it consistent. I have read that people use crushed coral for african cichlids so i was just wondering if it would do harm to the fish. Thanks for any help i'm an experienced fishkeeper but new to african cichlids.