My fish are sick or dying

[FoundMoney]

Thanks for all the responses. Unfortunately, most of my dwarfs have passed on. Both male and female agassizi died yesterday and the second female cockatoo does not look good. However, she does not show any of the signs of parasites. She is not flicking, does not have red gills. She just looks stressed and listless and is breathing heavily. The other fish, my 5 von rios, 3 otos, bristlenose, SAE and 4 ghost shrimp all look fine. My original female cockatoo is still doing fine as well, although I always worry about her health because she has a bad eye. If you see her from the bad side she looks dead.

My water parameters are all fine except for pH. It tends to drift upwards during the week. After a water change it is at 6.8, but 5 days later it may be up to 7.6. I think this is causing stress for my fish. I can't really figure out why it fluctuates like it does.

 

[WILDER]

Sorry for your losses, how old is the fish that is heavy breathing.

 

[FoundMoney]

I have only had her in the tank for 6 days. I don't know her actual age but I'm guessing she is a juvie.

Her mate died after about 3-4 days. He was really getting hassled by my male agassizi and I think it caused a lot of stress, although I don't know if it was the actual cause of his demise. Probably not since agassizi got ill all of a sudden and died yesterday.