I have a pair of Angels in a 55g tank along with five jumbo danios. Unfortunately my entire family was ill for the past month and I fell behind in tank maintenance.

At the same time my thermosat blew and the tank temp swung wildly in a few days, from about 70-86 degrees, so I think my veil tail got stressed out.

He now has fin rot, his dorsal and particularly his pec fins are really shreddy. Everyone else is fine, though I did lose my waterfall shrimp, probably due to poor bottom conditions.

I just did a 25% water change (The angels tend to not like drastic change), vacuumed the whole tank, cleaned and changed the filter and tank glass, and added stress zyme and 5 Tablespoons of Aquarium salt.

I've read that a salt bath can help, but don't know how to do this, and don't want to stress the fish any further. Does anyone know?

How long should it take to see improvement? should I add meds? I have no plants in the tank, but I've never had good experience with any meds. If yes, what should I use?

Should I do another water change in a few days?

My tank parameters all look good. No ammonia, bare trace nitrates/trites, ph, alkalinity etc all good.

If anyone has advice I'd be grateful-

Thanks much!

I would try Stress Coat, I'm not sure who manufactures it but most pet stores carry it.

I have never had any luck with Angelfish but with Bettas the stress coat seems to work.

thanks-
I thought stress-zyme (that I added) was the same thing- no?

All natural melafix I think works for fin rot. it says fin damage, and other related things. It's possible that might work, I'm not sure, I have never really had fin rot with one of my fish. Or infact, ever used my bottle of Melafix, but it's supposed to work well for a bunch of things.

Don't take my word however, I'm just pulling at strings...let a more experienced fish keeper advise you for fish illnesses.....LOL