Fish Dying Please Help

Discussion in 'Corydoras' started by Kate leonhard, Apr 25, 2017.

  1. Kate leonhardNew MemberMember

    Today when I got home from school I found two of my Cory catfish dead. I had recently bought a uv sterilizer to combat the algae bloom in the tank. On Sunday I left it on for 3 hours then turned it off. On Monday I left it on for 2 hours then turned it off. When I got home the tank was clearing up significantly, but all my fish are dying or are going to die. My blood parrot cichild is laying on its side and it's breathing heavy. The only survivors where a rubber lip pleco my blood parrot cichild and one other Cory catfish. The water perimeters are fine I tested it last night and when I got home. I have no idea what too do.

  2. TexasDomerFishlore LegendMember

    Welcome to Fishlore!

    Can you give us some more info?

    Tank size? Stocking?

    Can you list specific water parameters (pH, temp, ammonia, nitrites, nitrates)? What are you using to test them?

    How often do you do water changes, and how much do you change?
  3. AWheelerWell Known MemberMember

    What are your readings right now? What is the ph in the tank and tap ph? What kind of uv are you using, are you sure it is installed correctly?
  4. Kate leonhardNew MemberMember

    At the moment my readings are 0 I'm using the water testing kit and it says that water is fine. My tank size is 30 gallon. The uv sterilizer I'm using is 10 watt and I think it's installed correctly.
  5. Kate leonhardNew MemberMember

    Also just noticed that my cichlid and my dead Cory cat fish had holes in their heads so they probably have a parasite right
  6. AWheelerWell Known MemberMember

    Both had them? Usually hole in the head is a bacteria if I'm not mistaken. Is your nitrate also reading 0...when is the last time a water change was done, and how often do you do them?
  7. Kate leonhardNew MemberMember

    Yes my nitrate is also reading 0. And the last time I did a water change was Friday and it was a 25% I do a 25% water change every week.
  8. AWheelerWell Known MemberMember

    What fish are left in the tank and are they showing any symptoms? How long have you had the tank running, how long have you had the fish? Do you have a heavily planted tank?
  9. Kate leonhardNew MemberMember

    The fish that are left in the tank is a blood parrot cichlid, a Cory catfish, and a rubber lip pleco. The Cory catfish and the pleco are fine, but the parrot cichlid is laying at the bottom of the tank with its fins down and breathing heavily. It looks as if it has an indentation in its head and maybe some holes. I've had the tank sense January. And I've had the Cory catfish and the cichlid sense November. There are no plants in the tank.
  10. TexasDomerFishlore LegendMember

    Can you answer my questions above?

    Your tank is not cycled. What are you using to test the parameters?

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