- Joined
- Jul 8, 2019
- Messages
- 304
- Reaction score
- 60
- Location
- Bay Area CA
- What state or country do you live in
- California
Okay here we go, you had the right idea to use live rock from your previous tank but you simply overstocked too soon and most likely caused an ammonia spike which is poison and stresses the fish out severely causing ich and as Someone else mentioned Brooke as well (another deadly disease).
You got yourself into a rough situation and you can’t just add more stuff to the tank to fix it.
IF your yellow tang and 3 Chromis survive you will HAVE to quarantine them in a separate tank and treat, there are many methods but copper is most common.
You also now have ich in your main tank and will HAVE to leave it fishless for 72 days, there are theories and methods to lessen this time. Off the top I believe they are
1.) hyposalinity (lowering salt level)
and 2.) increasing temperature (which will kill ich faster ) but not possible for you if you plan on keeping the corals and shrimp in there unless you get a SECOND quarantine tank.
basically you now have ich in your tank and the ONLY way to safely proceed is by buying a separate “quarantine” tank putting your surviving fish in it.
It seems like your wanting to simply treat the fish let them heal and get back to adding stuff in theory this COULD work but it probably won’t and the ich in your system will just keep attacking and killing new fish.
i will try to catch all fish out and put in new tank leave my main tank no fish in 3 months i guess,but how i can treat the main tank now? low salt lvl? or treat the copper i posted? cause i want to keep my coral shrimp snails in main tank


