Hello all i am brand new to RC but still somewhat new to reefing as I ahve only been doing it for 5 years and I knw some who are life long reef keepers. My question is I have about 8 species of SPS most are frags but 3 are good size colonies for some reason lately my PE has been minimal and my blue mili colony has totally died turned white within 24-48 hours sloughing off tissue I belive this is called RTN. I am afraid my other colonies might soon do the same thing please help. Tank is a 90g with 2 150w mh and 2 t5 for supplement. I have a wet dry (old school I know) a large skimmer, phosban reactor, Uv sterilizer, and a surge 2500 for return. also 2 koralia 4's for flow. fish include a melanarus wrasee, true perc, longnose hawkfish, 3 anthias, naso tang, and powder blue. I have 3 peppermint shrimp, 1 skunk cleaner, lots of snails and 2 serpent stars.
P.S all my LPS and soft corals are fine
Levels
MG 1500 (little high not sure why)
Alk 9.3
Ca 490
ammonia 0
nitrite 0
nitrate 0
Sg 1.026
Temp 79-80
PH 8.0
I tested for copper at my LFS and it was 0
P.S all my LPS and soft corals are fine
Levels
MG 1500 (little high not sure why)
Alk 9.3
Ca 490
ammonia 0
nitrite 0
nitrate 0
Sg 1.026
Temp 79-80
PH 8.0
I tested for copper at my LFS and it was 0