hair algea

[Shipwreck]

First of make sure you thaw and rinse the frozen food before feeding it. It contains a lot of phosphates and other junk you don't want in the tank.

Assuming you are not adding new phosphates (rinsing your food, feeding sparingly, and using good RO/DI water) it should be on the decline. Next find a few Mexican Turbo Snails. These things are eating machines but also buldozers so make sure your corals are glued in place. I threw 5 in my 120 and they eliminated my red hair in days, they even cleaned off the shells of the other snails that had green hair growing on them.