Dwarf Gouramis All Dying

It seems whenever I finally realize how to properly care for one species of fish, another one goes and gets sick.

My tank is a 29 gall long with 45% water changes weekly, 0 am 0 nI <5 nitra.
Currently stocked with 5 corys, 2 bristlenose plecos, 5 z danios, and 1 (2, one passed away) dwarf gouramis. All the other fish in the tank were fine.

They both had been spending a lot of time at the top of the tank about a week ago, but the tank was well oxygenated so that didn't make sense. I treated for constipation with peas, put both in salt baths individually, but we were back to square one. Both had developed lesions on bodies (1 each) that wouldn't go away, and were getting increasingly paler, stomachs mildly swollen.

Now spending all time at top of tank, lethargic (can barely swim and hold themselves to the surface), poop is long, stringy, occasionally clear. Today I woke up and one Gourami was on the bottom, gasping, and before I could do anything he was gone. The other one seems close to death as well.

I want to know if there is anything I can do to save the last one, or if its over. Is this the infamous dwarf gourami idiovirus? LFS treats for parasites upon entry. They were just recently bought a few weeks back.

 

It does sound like idiovirus. Especially with the lesion.

 

Agree with above. Google DGIV. Many reputable fish stores won't carry Dwarves because of it. Sorry.

 

I had to give up on gouramis after mine died. Most likely iridovirus. Nothing I could do about it because there is no cure.

 

Same thing happened with mine. Was fine for a few months then stopped eating out of nowhere and was lethargic/pale and died within a week or so. All other fish were totally fine. Don't think I'll ever get a DG again

 

I feel like 45% weekly water changes would be a little too much for a tank like that.. you should see better results with just a 20% weekly or 40% biweekly. That heavy water change may be stressing them out. I could be wrong. Just a suggestion.

 

Agree with above. Google DGIV. Many reputable fish stores won't carry Dwarves because of it. Sorry.

A lot still do though. Replacement means money for those. Most fish in those shops are in fact dieing in the displaytanks.

It is so incredibly aweful. This issue has grown to catastrophic proportions.