Hello everyone, and thank you for the information I will receive in the future. I'm fairly new to the hobby, I have a 75 bow front reef tank. Mixed coral and few fish. Refug 30 gal. Running 48" t5 ati bp and cp 3 to 1. It has been up and running for little over a year with no real problems. "Nock on wood" had a green hair issues a while back but think I have it taken care of now. So like I said thanks AC