I have had this algae in my tank for quiet some time now, and was wondering what it is. My params are ammonia-0, nitrite-0, nitrates-<5, Cal-450, dkh-7 (just got some reef builders today), and pH-8.3. I do not have a PO4 test that works, but I do have a Phosban reactor with fresh rowaphos(250mL) on a 75 gallon tank. Please help me identify this algae and maybe some fish that will eat it. I would like a foxfaced rabbitfish.