Bleaching or growth

[Aesl1982]

Is this bleaching or growth 289965

[Aesl1982]

Params 360, 7.2, 1380. Before weekly water change after 460,8.3,1400. No3 0

[james2369]

What about lights and the placement of the coarl

[Aesl1982]

Light are 3x 250 metal halides and coral is midway up in a 30 inch tank light are 8" off water

[Sonicboom]

something might be bothering/eating it, growth on montis is all around the outer most edge.

[DDon]

Might take a look after lights out with a flashlight, monti eating nudibranch (MEN) are a possibility. Not the easiest to see but if you look close you can. Had white spots start showing on my monties when I had MEN
Doesn't look like bleaching or new growth.

[Aesl1982]

Hard too see in picture buy all that white is on the edges. Nothing on the center or "main"of coral. I'll pull and dip and put in qt to observe

[DDon]

Could you get a sharper picture of it?