I never tryed anything to keep to get rid of all that, just water change once month with r/o water, so ill check that out asap and get another powerhead in there this weekend. besides that the lights are bran new light bulbs and fix, but i want to change the light bulbs to a diffrent brand. I was trying to find uv international bulbs but i cant find anyware that sells them. got any tips on wats a good brand of bulbs? bacteria/carbon dosing or Granular ferric oxide? wats that i never heard of it ?