bigblue
10-09-2008, 11:44 AM
I setup a tank with live rock I purchased from a store in my area, I purchased 3lbs of white rocks that look like dried up sponge and about 5lbs of a rock that was green and purple it looked painted on. now its been about three or four weeks now, the rocks has this brown aglae looking stuff around 3/4 of the rocks (?) is that good or bad.