cronic coral bail-out

[reefgeek96]

over the past few months I have had a large welsco open brain begin to slowly peel from its skeleton and no matter what I did I could not reveres or stop the tissue recession, recently it completely let go of its skeleton. The part that is worrying me is now 2 other corals have begun to recede too, a wall hammer and a scoly. all my parameters are stable and other than these corals all others are growing and happy the only change I have made is switching to led lights but as soon as I thought they might be causing this problem I dimmed them way down and switched back to mostly t5's dose anyone have any ideas as to why this is happening?

 

[skinz78]

Are you feeding them? What inverts do you have? I've had hermit crabs even eat certain types of Hammers.

 

[reefgeek96]

I feed them periodically and I got fed up with crabs/snail nocking corals over so the only inverts I have left are a circle star and a cucumber

 

[Tahoe61]

What parameters are you testing for, with what brand of kit?

 

[H2O]

I know couple people when they switched to leds some of them lost half their tanks mostly lps chalice coral they like low to medium light

 

[reefgeek96]

my parameters are ph 8.1, alk 9dkh, salinity 1.026 specific gravity phosphate 0.06ppm, ammonia and nitrite are both 0 that is all I have tested regularly and my alk test is Elos all the others are hanna electronic lab grade tests.