If your fish is a pufferfish, walleye, rabbit fish, or scorpionfish, occasional eye cloudiness might actually be normal. However, you should contact your vet if the cloudiness persists for several days. [3] X Research source
Fish parasites and diseases require living hosts. If you think your fish died of a disease, their tankmates might already be infected. Monitor them for symptoms. If they don’t look sick or develop symptoms after a few days, they were strong enough to fight off the disease. [6] X Research source
Avoid canned peas, as they contain sodium and spices that can hurt your fish. Soften the peas. You can do this by boiling them on the stovetop in filtered water for one minute. Allow them to cool down after you remove them from the pan. Don’t use a microwave, since this can destroy vital nutrients. Remove the skin by peeling it off with your fingers. Make sure you wash your hands first! Cut the peas into small pieces. First, cut them into halves if they didn’t split naturally when you peeled them. Then, cut them into quarters. If your fish is small, cut the pieces even smaller.
Search for this information on veterinary websites or at your local vet’s office. Visit your public library or pet store for informative books. If you have access to scholarly databases, search for articles in veterinary journals. Some fish like to play dead just to see you freak out. Be sure to double-check
Test your tank water for chlorine, chloramine, and heavy metal before adding conditioner. You can buy testing kits at your local pet store. Follow the instructions on the package to avoid false positives or negatives. Alternatively, you can buy distilled water from your local grocery store and use that in your tank instead of tap water.
Monitor your fish to make sure it returns to normal behavior after the temperature has normalized. In the future, stick to regular partial water changes to avoid sudden changes in temperature or pH. If you need to change a large amount of water, remove your fish before doing so. Place your fish (and their water) in a plastic bag and then slowly acclimate them to the new temperature by floating the bag in the tank.
