Molly fish quickly dying

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Cskurda109

Aquarium Advice Newbie
Joined
Jan 22, 2020
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I have had a momma molly fish since July, she had babies and I now have 10 mollies in a 10 gallon tank (I know that is too many, but I haven't been able to give them away to anyone!) Anyways they have been healthy and active until about two weeks ago. They haven't been eating so the tank got very dirty. I had a sign of ich so that was treated, didn't feed them for a few days, did a partial water change and changed filter. I have a heater and a bubble stone. I noticed one fish sick with bladder disease he was swimming upside down so I quarantined him and he recovered in a day. Then I had two mollies die in the tank overnight. Tank became dirty again. I have now done a full water change, cleaned everything, tested and tank is good so I put the fish back in. But I still notice the fish are sick with something. Still not active still not eating. And now it's affected my momma fish the strongest one. The only thing I can notice appearance wise is their bottom fins turning white and ragged. Some of their bellies look an iridescent white underneath. Almost like their glowing. I hope I can catch this before I lose the momma. Any advice would be helpful, thank you!
 
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