Coral Quarantine Help

[Opah]

Some new corals are starting to recede and brown out in quarantine.

Here is my setup.

60 gallon
4 HOB filters
4 sponge
2 small power heads
1 black box ~12" high
1 reefbrite blue LED strip
Water is from main system (running for 11 years)
Alk 8.7
Calcium 430
Nitrate 3
Phosphate 0.05

I do water changes once a week. ~10 gallons from main display.

I feed aqua barn phyto daily (about 20ml) and reef chili every other day. Light period is ~12 hours.

I am planning to move some rock from the sump over and considering dosing some coral aminos. I have a par meter coming.

Coral is from Top Shelf.

Any thoughts or advice?

 

[ScottyD36]

Browning out is the increase of zooanthelle algae.
Typically from elevated po4
Also can be seen from a lack of par from the lighting.