Back in may I bought a flame angel and yellow tang. Quarantined them and acclimated into dt. Maybe a week after being in DT my angel was dead. Then one of my false perculas lost all color, even the black from his fins. Quit eating. Maybe 2 weeks later my fox face quit eating. Both would lay on the sand. Had a red spot on them and their mouths stayed open. Both eventually died. I kept close attention to water parameters and all was well. My other clown and yellow tang were fine. My urchin died next. So I said I wasn't buying anymore fish. But the hubby waited until we went on vacation and bought a coral beauty, 6- line, and (3) green chromis while we weeee on vacation. Put them all in qt when we got home and lost 2 of the chromis and the 6 line. Now I am left with the coral, tang, one clown, and 1 chromis. All are eating well and seem to be okay I am just scared of more fatalities. Have made sure to do water changes and bought a better filter and another powerhead. My husband seems to think we weren't feeding adequate nutrition. We were feeding flake, and enriched brine. Now I have added algae disks,mysis, and occasional krill along with the brine and flake. Seems like a lot of food though....