Algae ID

[JohnnyReeftank]

I had 2 clowns and a wrasse....but the wrasse is a bully and now its just him. I thaw my frozen food and occasionally try and rinse it too....although its tough to rinse the brine shrimp without losing them all down the sink. I try to get rid of as much of the shrimp juice as I can.

[Aquattro]

Used rock? It's possible it came from a high nutrient system if so. Have you tested NO3/PO3?