Coral Health Help

[cody_brown11]

A couple of my LPS corals are losing colour and can’t figure out what is causing it.

I am experiencing an ammonia spike (of 1 mg/l) in a semi established tank. Aprox 4 months old. Completely cycled. All other corals seem to be happy. Were losing colour prior to detected spike

both coral were on substrate until colour loss now moved to halfway up tank. (Moderate/high light

parameters are:
salinity- 1.026
Temp- 27 deg celsius
Ammonia- 1
Nitrate- 10
Alk- 9.5
Ph- not sure
Phos- 0.04
Mag- 1380
Cal- 400

photos attached, see the “browning” colour in both coral, when bought both were super deep and saturated in colour.

any help will be greatly appreciated!!

 

[blaxsun]

Any fish or is your tanks corals only?

 

[cody_brown11]

Any fish or is your tanks corals only?

2 clowns, one fire fish

 

[cody_brown11]

Did a water test today, now at 0 ammonia

 

[blaxsun]

Any improvement with the corals, or too early to tell?

 

[cody_brown11]

Any improvement with the corals, or too early to tell?

Too early, if anything theyve gotten worse

 

[cody_brown11]

Update:
Ammonia - 0
Phosphate up to 0.09