Anonymous
Anonymous asked in PetsFish · 3 months ago

Had this tank for 3 months fish doing fine. did a water change and all the fish is dead what happened?

8 Answers

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  • 1 month ago

    You probably gave them tap water, tap water is toxic to fish.

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  • 2 months ago

    Could be a number of things!! Without more info it’s hard to know. Obviously it was the water. But it could’ve been too hot or cold. Could’ve been to much tapp chemicals and you killed all the good bacteria by taking out too much water. The bucket could’ve had soap or other chemical residue if the bucket was used for other than the fish. 

    Long story, you killed your fish with the water change. But we need more info to explain exactly how.

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  • 2 months ago

    How big is the aquarium, what do you mean by "water change" where did the water come from?

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  • kswck2
    Lv 7
    2 months ago

    The first two questions that come to mind are how Much water did you change and What did you refill the tank with? Water straight from the tap? 

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  • 3 months ago

    How did you change the water?  what size tank? did you add dechlorinator?  did you match the temperature of the new water to that of the remaining water?  Did you remove the fish to change the water?  that is not recommended.  

    Did your hands have lotion, nail polish remover, other contaminates?

    Did you use the same water as before?  if you used tap water last time, did you use tap water from the same house this time, or did you try to change it up and use distillled or bottled or somthing that might have suddenly changed the ph. ?

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  • PR
    Lv 7
    3 months ago

    It might depend on how much water was changed. If it was a large change, it will remove the beneficial bacteria and cause distress in the fish. You might see them gasping for air, etc. Be sure when you do water changes, they are small and not too large. If you have accidentally done a change that is too large, be sure you have a pump with an air stone for bubbling/aeration. 

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  • 3 months ago

    maybe the water was spoiled

    • PR
      Lv 7
      3 months agoReport

      What? Have you owned a fish tank, Pearl?

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  • 3 months ago

    Was it your first water change in 3 months? That might be the problem. Hardier fish would probably be fine if you properly conditioned the water , but delicate fish might not have survived the change in water chemistry. 

    I always let the water sit in a bucket for 6 hours before adding it to an aquarium, treat with seachem prime, and change no more that 10% of water every week. 

    Smaller routine water changes will always be better for your aquarium than sudden larger water changes. I am guessing that this is probably what happened. Just learn from it and move on. 

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