I had it - and then I didn't. When I did, it was only on a few places in the rock and in and amongst some green star polyp that came with the rock. Some things I did -
- Pulled it off the rock where I could and threw it away.
- Managed my water params a little better. Nitrate was reasonably high (still runs high) but I started dosing one quarter tsp of sugar into the sump - I do this every other day.
- Got a conch
- Got a spiny sea urchin
- Got a Lawnmower Blenny
- Got a Yellow Tang with some corals (wasn't planning on him but he's doing great)
One day I woke up, looked at the tank and realized that every bit of hair algae was gone. I don't really know who or what to attribute that to but now, other than needing to clean the glass with a magnet once a week, no algae issues.