Dying Fish in 55 gallon

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Phoenix68

Aquarium Advice Newbie
Joined
Jun 7, 2016
Messages
1
Location
Colorado
I have a 55 gallon that was cycled properly and has had fish for 6 ish months.
The water is testing fine, i do weekly 10% water changes, change the filter on time, and I cant see any apparent diseases on the fish.

I have 1 large Angel, 3 catfish, 1 bristlenose pleco, and a variety of mollies. Everyone except the mollies are doing fine. Ive never kept mollies before, but the lady at my local fish store recommended them for tank mates for my angel.I purchased 10, some babies arrived, but over the last couple months all but 2 mollies have died with very little warning. They start hanging out at the bottom of the tank, and then are dead within a day or two.
What am I doing wrong? What other species should I purchase to replace the mollies?

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Hi, welcome to the forum. Sorry to hear on your tank. :(

Can you post all water test readings please so we can close this out. Also is the test kit a solution/vial one?

Have you changed anything in the tank when they die?
 
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