I have a 47g sw tank, about 25lbs of live rock so far, it has cycled for about 2 mths, but my bigger pieces of live rock , is not really growing much algae on it at all, it has some brown spots and some light green, but not much at all, it is mostly a white and grey color.
The lighting i have on it is only 15w lamp, i know I need to upgrade, but what else can I do to get it to progress towards purple algae. I bought calcium to add, but how often should I add that?
Also will adding a powerhead increase oxygen flow and helo with algae as well?
Right now all I have on it is a emerson 400 bio wheel filter.