What is wrong with my corals? Pics

[Gwynhidwy]

I really think you need to address the ammonia problem more than the lights or the phosphates. Yes old lights and high phosphates can cause problems, but 0.25 ammonia reading is high enough to kill fish, and definitely high enough to stress and/or kill invertebrates. The phosphates aren't helping, but anytime you have ANY ammonia reading in a populated tank, it needs to be addressed ASAP!

 

[giambi4343]

ok all the inverts and fish seem ok. ill do another water change tomorrow to fix that ammonia.

 

[TrojanScott]

Agreed, probabaly your phosphates. Water temp at 82 had nothing to do with it, and is fine.