Not sure what is going on, phosphates are 0 and just to be sure I am running phosgaurd.I just did a water change and scrubbed the some alage off the rocks,with a tooth brush, but that just seemed to help spread it every where. I have a 32 gallon Biocube with the intank media basket and refugeum and have chaeto in the refugeum. I use my own rodi water. The aquarium is about 3 months old.
