I upgraded to a 300 gallon tank, it's been up and running for about 4 months. I just have 6 blue chromis, 8 anthias, kole tang, blue hippo tang, 2 clown fish and copper band butterfly. I think I might have donetoo many water changes to early. I was doing 50 to 60 gallons once a week. All the parameters were perfect..nitrate 0, phosphate 0 ect..My big problem which I can't understand is that I have hair algae growing. How is that? I also have a few pieces of coral doing great. Any help would be greatly appreciated.