To much light for my new LPS... receding?

[TheCoralGarage]

Hey all,
Lately, some new chalices and one acan started to recede. The tank is about 18 months old, existing coral is good and haven't lost a fish since I started this tank. It's a 65 corner with a 20 sump/fuge. Running two MP10s, good return, cheato grows well.

Salinity: 1.025
Ca: 480
Mg: 1500+ (running high for bubble algae)
Kh: 8.9
pH: 8.3 (avg)
Nitrates: 5ppm
Ammonia & nitrite: 0

I do run 3 old AI Sol Blue units, 9 hours a day with a 1 hour ramp, W: 45% B1: 80% B2: 90%

I've moved the receding coral to a corner with low light and low flow and they seem stable.

Any thoughts?

 

[BadPanda]

I'm on the same boat here. Currently have acro's on top with Lps(torch, hammer and duncan) at the bottom and doing well. The moment I added my acan, I noticed the guy closing up. X2 AI primes with ab+ settings for my nuvo 20

 

[DSC reef]

Hey all,
Lately, some new chalices and one acan started to recede. The tank is about 18 months old, existing coral is good and haven't lost a fish since I started this tank. It's a 65 corner with a 20 sump/fuge. Running two MP10s, good return, cheato grows well.

Salinity: 1.025
Ca: 480
Mg: 1500+ (running high for bubble algae)
Kh: 8.9
pH: 8.3 (avg)
Nitrates: 5ppm
Ammonia & nitrite: 0

I do run 3 old AI Sol Blue units, 9 hours a day with a 1 hour ramp, W: 45% B1: 80% B2: 90%

I've moved the receding coral to a corner with low light and low flow and they seem stable.

Any thoughts?

Do you feed the coral at all? To clean of water can have an impact like this. I'd keep the corals in a lower light and flow for the time being and see if it starts to recover.

 

[TheCoralGarage]

I do feed, Reef Bugs and Snow, also target feed LPS small mysis. One of the chalice frags (Oregon Mummy Eye) is in bad shape but is still eating.

I have my lights about 10" above the water. I knew 3 modules would be a lot but it gives good coverage on the corner tank. I've been dipping and using Restor, think for now I'll just leave them be and monitor them. It's odd that it's mainly all different type of echinopora chalices from different shops.

 

[TheCoralGarage]

Here are the three that are worst off, Mummy Eye, Golden Fleece, and a red/pink frag. I also have a new Miami Hurricane colony that wasn't in the best shape but also started to recede in 1 or 2 days. Again, other LPS & SPS is doing great.