The best method to avoid these problems is to prevent them before the fish are introduced to the main display tank. Having a proper quarantine tank
set up to keep newly aquired fish is IMO
, the only true way to ensure your fish's best chances at captive life.
If done correctly you will not need to treat the main tank, worry about infecting tankmates or worse. It is not too late to try although your vacation will mean training someone to monitor the fish carefully while your away. Hyposalinity
is a very effective method and will not futher stress the fish with the use of meds...