Trumpet Corals Dying

[johnstires]

I have had pale blue trumpet corals in my tank for probably 10 years and have too many heads to count. They have survived this entire time and without any issue and even weathered an entire tank crash when I was on vacation, where pretty much my entire tank died off.

The last 3 weeks they have receded and seem to be dying off. It happened a few weeks after I purchased the following corals:

Monti Cap
Golden Plume Gorgonia
Lobophyllia
Aleopora Branch

I also recently changed from T5s to LEDs.

Since these changes, the corals have been doing really bad (see pic). Tank params are fine and everything else is super healthy in my tank which is mostly comprised of easy corals, LPS, softies, zoas, mushrooms.

I have numerous trumpet colonies and have put them everywhere in the tank, low flow, high flow, low light, high light, but they all seem to be doing the same recession.

Wondering if there is some sort of chemical battle going on. I'm completely baffled, anyone have any ideas?

 

[Dkuhlmann]

The one thing you've done that stands out to me is change the the lights. I would dial back the led's and let them acclimate slower. It shouldn't bother the other corals.

 

[Docdiggy]

I agree it sounds like the leds.

 

[Scorpius]

LED's are like neutron star supernovas. Gotta start low. :lol:

 

[johnstires]

Yeah after I wrote this I thought to myself, maybe the LEDs are too bright. All my other corals seem to love them, so it didn't occur to me that it might be the lights. I dialed back the white light to 75% a few days ago. No change so far but will see how it fairs. I may knock it down to 50%.

 

[Crush Coral]

I would feed them heavy while they are trying to recover.