Brain receding

[hessfish125]

My brain coral is receding. I am not sure what to do. It started when I turned out lights for 3 days to combat purple algae.

Any help appreciated.

 

[RA]

My guess is that it really wasn't doing well before you shut the lights off, and then with the lights off it got worse. It sounds like your phosphates are high and you need to fix that.

 

[shifty51008]

you will get better help in the LPS forum as this is not a soft coral, but what are your water parameters? numbers please.