Hi, Water test results areas follows ; ammon 0, trites 0, trates 80 yes I need a water change. ph 8.0 , phos 0, kh 107.4 not good . 90 gallon tank with a 25 gallon sump w/ skimmer, multiple corals , 4 cleaner shrimp, 6 turbo, asst. small snails, 5 peppermint shrimp,2sallylightfoots, 1 coral banded , 25 hermits, 1 clown, 1 yellow tang 3", 1 hippo tang 2", kole tang 2", koran angel 2", coral beauty small, blue face angel 2", 2 gobies . pc lighting 400 watts approx, plenty of flow all most to much. Yes i just ran carbon not sure what brand reef safe from lfs Thanks JOHN