i am getting a carpet looking algae with a red ish brown color, it is taking over my sand bed. any ideas?
40 gallons
over 1000gph
backpack skimmer
4 inches sand
50 lbs rock
190W light on 10 hours
few haermit crabs and snails, 3 shrip, 2 clownfish, birttle star
nitrate - 0
ph - 7.8
ammonia- 0...