What to do when a fantail fish has swim-bladder?

Your fish wil probably die very soon in 3 liters. They will need at least 113 liters for both. The peas should be split in half when they fish are young. You may not see results for up to a week with the pea method. Swim bladder is not contagious. Gett sinking pellets instead of flakes to prevent it in the future. Plants do not take away oxygen, they add it. If your tank doesnt have a filter, you may see your fish gulping for air at the top. Goldfish need a filter very bad! To prevent your fish from getting sicker, you will need to change the water every day. This will put a lot of stress on your fish, but it is necessary for your tank size right now. YOU NEED A BIGGER TANK ASAP!