[musho3210]

the filter is an undergravel filter for anyone else who asks you. I think this is swim bladder disease, do you soak your flake food for a few minutes before you feed your fish?

 

[musho3210]

you should take the food and place it in a tiny container, the lid to the food is great. Fill the container with water and wait 1-2 minutes, then pour it into the tank, this way there is no air in the fish food and it will lessen the chance of swim bladder disease