Thank you GrendelPrime76 and specially you sandwi54 for your very informative answer.
I do have a few questions, so, I only have a spare 20 gal tank i could use as a QT to treat my fish, but, do i have to transfer all fish there to let DT without fish for a while ??
Can i leave my cleaner shrimp, hermits and 2 red bali starfish there without harming them ??
I would love to just get rid of ich in my DT, so does that mean take fish out, do major waterchange, treat fish ALL fish in QT and them return to DT ??
