I dont really have a QT Tank. Everything was fine until I went to Pacific Aquarium in Delancy and picked up a Fiji Wrasse and 3 Bangaii Cardinal and thats when everything went downhill. I started losing Bangaii Cardinal one by one and i thought it was because it they werent eating. Now i get home after work and im seeing massive spots all over my 5 fishes. SMH
For the future, you can use a 5 gallon bucket as a qt for a few small fish if you really don't have the space for a dedicated qt tank. Well now you're forced to set one up for all of them, sorry. Not the end of the world. Lots of good tutorials out there.
I would ride it out dip food in garlic and make sure fish are eating and in my opinion any other fish you put in there will probably get bullied by six line wrasse, I think theree aggressive and when I had one I couldn't put anything in tank he's probably stressed out other fish when you put them in.
Really a crappy position to be in, and unfortunately most of us have been there. Battled ich a few months back after picking up a pair of bangai cardinals. They died within 48 hours and unfortunately infected my 6 line, ocellaris and ywg.
I treated with Sicce Hypercure...but honestly dont think it had any effect.
I fed pellets with garlic and luckily they were strong enough to fight it off and survive.
If getting them out of there and into a QT tank or pail to treat with copper is an option id do it.
I was in the same position as u conflicted wether to run the tank fallow or ride it out I chose to ride it out soaked mysis with selcon and garlic and that really made a difference I lost a few fish but now got a uv sterilizer and still soak the food to ensure the fishes immune system stays strong good luck man parasites suck but we all deal with them try not to stress out the fish to much by putting ur hand in the tank or stuff like that