Hi guys, I've been running a marine tank with purple tip sebae anemone(2), ocellaris clowfish(2), firefish(2), hermit crabs (2) for about a year now. I recently upgraded my tank from 90 liters to 220 liters tank and stocked few more fishes in there. I added blue tang(1), lipstick tang(1) and black and white chromis(2) into the mix. But within 2 days of adding these fishes my blue tang was infested with ICH and it was on and off, upon contacting my LPS they said it's due to stress and would fight it back as it's not too bad. The blue tang would have the white spots on it's body only a few days a week (on and off) and would rub against other fishes, I moved all the fishes(as I felt all of them had got ICH or was exposed to atleast) to QT tank and dosed with oodonex as suggested by my LPS. But the very next day I lost my blue tang , a day after I lost a black and white chromis and on the same day I lost a male clownfish .My other three fishes are very sick and I feel they are losing the battle (female clownfish, black and white chromis and firefish) and I've moved the lipstick tang back to the display tank as he has got white spots only on his pectoral fins and I've been very scared as QT tank has been a killing machine lately rather than doing the opposite. I live in Sydney, Australia, LOOKING FOR DESPERATE HELP AND SUGGESTIONS GUYS. PLEASE HELP ME SAVE MY FISHES.