Quote Originally Posted by Louis View Post
Have your phosphates checked with a digital Hanna meter. NSW has <= .02ppm phosphates. High nitrates, phosphates, and light is all algae needs to become a problem. If you can control these three things you can defeat the algae.

Phosphate comes from fish food(preservatives), can be leached out of Liverock and sand beds, and can be found in tap water.

Using phosphate remover (GFO, phosguard, chemi-pure elite, phosban, etc) is a very effective way of lowering po4 to proper levels.

I use GFO HC from BRS along weekly water changes to control nitrate and phosphate.

HTH

Louis
X2 plus what Texreefer said it will take a while to fix itself. I do not know what types of coral you have but softies love pollution and help control phosphates, just be careful because they will take over a SPS tank. As far as testing for phosphates, algae is the best test. Gary Powell use to always say there are two types of phosphates the one that test kits are made for and the one that grows algae.