Phosphate

[Treebeard]

Originally Posted by fishytime

Just a heads up....I would ditch the NLS pellets....read the ingredients....they contain copper. As far as the phosphates go my guess would be a combination of the pellet food and bio-organic phosphate leeching from the rock. Also your tank is still relatively new, in the grand scheme of things.

Check out the NLS forums regarding the copper in their food.