My tank is a 180 gallon display with 55 gallon sump, has been running for about 2 months but started with half live rock and half dry rock as well as about 130 gallons of cycled water. I noticed these green spots of algae on many pieces of my rock, on my sand, as well as on my power heads and was wondering what this could be. Is it good or bad? Any ideas?
Thanks
Thanks
