I have a question I bought a domino damsel for cycling. I have a 29g standard 30" x12" x 18" and the fish I bought has ick. Should I treat the whole tank (which is on a 20g tall sump I made)that only has dry live rock and one small peace of live rock with coarline algae on it that I bought 2 months ahead of time seeding other small rocks for refugium. Should I treat whole tank or quarantine in hospital tank?
