help freshwater dip gone wrong?

[fishkeeper8774]

I bought 4 anthias a month ago but I didn’t quarantine them. The smallest female anthias wasn’t really eating much at least she was taking some bites at the frozen food from time to time which was already a bad sign i suppose if they require 5 feedings per day. She just decided to stop eating at all today, hid in a cave and heavily breathe. I suppose it was velvet so I did a fw dip for four minutes. I think i just shocked the fish bcz the temperature in the fw dip was 24 degrees Celcius and the temperature in my tank is about 27 degrees Celcius. Also I didn’t check the ph and now the fish is upside down, heavily breathing in a fish box and she seems worse than before. I checked the fw dip and there weren’t much signs of velvet. I think I just killed the fish. What can I do to save her??? Actually I think there’s no way she survives there. She looks too bad to recover from that. What could have I done differently to save her???

Update: She can’t swim straight and everytime she tries she just does circular motions... i dont know if its bcz of the

fw dip or bcz i broke her swim bladder...

Also I doubt it was bcz of aggression... my biggest anthias seems to be picking on the other two females but i’ve never saw her have any interest in this one idk why? They would rarely stick togheter and everyone had their own place. The weakest anthias was always swimming near the powehead and would horizontally perch on the silicone from the tank..



Sorry for the bad written post I’m just really stressed out rn...

 

[HotRocks]

Sorry to hear about this

Is the fish still alive?

Velvet is microscopic, a FW dip can provide temporary relief but you wouldn't "see anything" in the water.

It's very important for the temps to match between the dip and the tank. It sounds as if the fish was already in trouble when you dipped. Dips typically won't kill a fish unless they were already on the way out.