First move was he is now in the qt tank. I will go test the water in there.
qt tank is 10 gal: alk - high end of normal
Nitrite: .2
Ph between 7.8 and 8.0
Ammonia - 0
salinity - 1.021
recent history - main tank has 2 tomato clowns, 2 false percula clowns, 2 domino damsels, 1 3-striped damsel, 1 sgt major damsel, 1 yellow tang, 1 bi-color angel, 2 scooter blennies (1 is in qt), 2 hermit crabs, 2 snails, 1 cleaner shrimp. Recent changes include putting a 10 lb piece of lr and re-arrange the other dead rocks/decorations. The rock was cured plus it sat in my qt tank for a week.
main tank:alk - high end of normal
Nitrite: .1
Ph 8.0
Ammonia - 0.25
salinity - 1.021
main tank has fluval 404, prizm skimmer, 1 powerhead, 2 heaters.
What now?