Originally Posted by Pontius
C Balance, Purple Up, Kent's A/B formula, or kalkwasser will all cause good coralline growth if you also have decent lighting. you need to test for calcium and alkalinity.
I personally think waiting is best. That's why we never used the Purple Up. It was free at the frag conference last year. That's the only reason we have it. However, with my 29 gal. tank that crashed, I was thinking of trying it out a couple of times, but haven't had the guts to try it. So there the bottle sits.