Ok so I started a sorority about a week ago and I have purchased 15 females for my 55gal tank. My tank is heated and fully cycled. 5 of my females have dropped dead. I cant figure out why. One eggy females stomach had a hole in it but the others have been fine and they look healthy just dead. Can anyone help me as to why they may be dying? I have this beautiful Gold female who looks like she is taking her last breaths as of right now...
Did you quarantine the females before adding them to the tank? Unfortunately, this happens a lot with sororities. I know columnaris is a common cause but it could be a bacterial infection of sorts. Those generally move fast. Also, Kanaplex by Seachem would treat both of those, but I don't know if you'd want to start treatment since the cause is really unknown.
I put them all in at the same time then I used melafix and stress coat to treat whatever they may had.... Assuming one or some of them had fin rot...But no one is cloudy, no signs of fungus, or sores or anything. My gold female took her last breath about 15 mins ago. The rest of the fish are all swimming around and eating and fine. Maybe she was just sick?
Have you tested your water recently for ammonia, nitrites & nitrates? If you added 15 fish at once it may have messed up your water parameters since the BB wouldn't have been used to the bio load. Also, how did you cycle your tank before adding the fish?
+1. Do a water change to get rid of the MelaFix. If you must use one of the "fix" products, use BettaFix (much harder to overdose since it is much less concentrated), but it is really only to heal outside problems such as finrot. Clean, warm water will do the same job with less risk.
Honestly, my favorite product for fin damage/rot is VitaChem. It can be hard to find but its super concentrated at 1 drop per gallon and it not only helps with fins healing, but it also supports the immune system and can be used indefinitely. Food can also be soaked in it to support the immune system and brighten the fish's colors.
I like to compare it to IAL because its just good for the fish all around, but it doesn't turn the water colors.
Dumb queston but are you using conditioner?
Also the one with the hole, is it possible the other females caused it?
Take the one that you said may be on their last breath and float her in a cup. If she is being harassed or stressed by the other - it will cause rapid mouth/gill movement.