I have a serious problem with my tank. I have had a healthy, 50 gallon African cichlid tank for several years.
My Red Zebras breed like crazy. I went on vacation for two weeks and left a “pet sitter” to care for my cats and fish. When I returned, 10 fish were dead and what’s worse is they continue to die. The Pseudotropheus estherae are decimated with only two left and I have also lost several perlmutts.
The Plecostomus’ are fine as well as the Giraffe Haplochromis.
Before I left, I added a couple Demasoni and they seem to be ok.
The hardest hit are the Zebras and next hardest hit are the Perlmutts.
I have a couple Cat fish and they are doing fine.
I have tested for pH, ammonia, nitrates/ nitrites, hardness, temp, and chloramines/ chlorine.
The fish show NO signs of infection or rot, they just become lethargic and die in a matter of a couple hours. I am afraid that I am loosing my tank.
I have changed the water and cleaned, but not disinfected the rocks. I vacuumed the substrate.
The tank had been a breeding, healthy tank for years.