Help!! Dead fish in quarantine tank

Fairy wrasses generally do well in chelated copper as long as you rise it to therapeutic levels over the course of 3 or 4 days. You will definitely want to treat your new arrivals with copper and prazipro since you went to the trouble off qt'ing all your fish and running your DT fallow.

 

Don't forget that you'll want a lid of some kind for that wrasse!

 

I pretty much agree with Barrett, looks bacterial.

QT needs to be kept clean, well fed, well oxygenated. Tough to do it all at once.

 

How are all the other fish doing?

 

Bacterial infections like that often happen after fish have parasites like velvet from the open wound left behind after the parasite falls off. The best thing to prevent it is to keep pristine water conditions and feed high quality vitamin soaked foods to boost the fishes immune system.

That is a lot of fish in two 40 gal tanks. Ideally you should have at least one more qt. If you can't get one more filtration is never a bad idea, I would get some bottled bacteria and seed either the sponge filter or the filter floss for the hob filter. Soak the actual filter media do not put the bacteria in the water. You could do the same thing if you are able to setup another qt.

 

Just make sure you are very well oxygenated while treating with prazipro. There is alcohol mixed into the prazipro which makes the praziquantel more soluble (it's actually kind of a pain to try to get dry praziquantel to mix with water). The downside though is that the alcohol can cause a bacterial bloom and deplete oxygen levels.

 

How are your fish doing? I hope all is well.

 

Seachem's Focus is a binder used when putting medication in fish food. Other good products to use when QTing fish is Selcon or Selco. Those are good...I use Selco regularly feeding my fish.

Great job giving treatment guidance Barret and Actuary!! You too Craig and Bud

 

Since Mike hasn't had a chance to chime in, I will (the wifey). No more losses have happened. We added a bunch of more filtration for everyone and I stopped doing every other day water changes unless I see something other than nitrite or nitrate creep up. We added a third tank as well and added a magnificent foxface, powder brown tang, a replacement goby, and a orange back wrasse to start the quarantine process of them since we are less than 3 weeks out from putting everyone back in the tank (thank goodness!).

Does anyone have advice for order of putting the fish back in to the display tank? Put all the big fish in (foxface and two tangs) for a few days and then put in the smaller fish, or smaller fish first to find their hiding spots and then a few days later add in the larger fish? The reason I'm asking is not only to avoid a mini-cycle in the display tank, but our purple tang has gotten increasingly aggressive towards the coral beauty. I currently have a mirror against the tank to help him fight that instead of the fish, but it isn't working. There's plenty of food available for him. The coral beauty never bothers him. I'm almost to the point that I think I need to take the coral beauty out and put him in one of the other two tanks before he gets beat up.

Thanks to everyone for your help with our issue and giving some awesome advice.

 

Put the smaller more timid fish in first for at least a week to establish there territory before the more aggressive fish come in and take the whole tank. I would put the coral beauty in with the clown fish that have been quarantined already to avoid re infection from any parasites the new fish may have. Glad to hear everyone is doing well. How long has you DT been fallow? If it has been 76 days you're good to start restocking the DT.

 

If the purple tang is your most aggressive fish I would put it in last, that should help curb some aggression.