Originally Posted by daney90
Did you use purple up? I'm using a base rock and its been 3 months now and my rocks are still white. Lol!! I want some colour ;P
Purple up isn't very credible IMHO
. If you keep your alkalinity, calcium and magnesium up, have good strong flow and do water changed coralline will usually grow. Sometimes people have issues with it if their lights are super bright in the very beginning. Lots of times during the initial growth spurt alkalinity, calcium, magnesium and even strontium can shoot down and as long as you bring it up and keep it half decent it should take off. Good salt and frequent water changes certainly help. Knowing your levels is 2/3 of the battle.