Are they definitely Clown Loaches and not some other loach species? Upload a pic or video clip, the behaviour you are describing sounds very unusual for a Clown Loach, but there are some spiteful loach species often sold.
How did you cycle the tank?
How are you testing the water? Have you done daily checks for two weeks after adding the loaches?
Did these loaches come from a tank containing lots of other Clown Loaches and/or other species?
Please give us a full stocking list (species, approx. size excluding their tail fin, numbers) before these recent deaths.
i change 6 gallons every two weeks i am running a fluval u4 filter replacing the filters every 3 months i test the water every week and also take samples to my lfs the loaches came from a tank with loads of other clown loaches and another breed of fish cant remember what they were
i have
3 yellow honey guorami 1 1/2"
2 congo frogs 1 inch
2 celebes rainbow fish 1 1/2"
6 neon tetras 1 inch
6 black phantom tetras 1 1/2"
2 blue guorami 2-3"
2 baby veil angel fish 2"
2 kissing fish 1-2"
and a baby cat fish 1 1/2"
