So, a three-inch betta fish would need at least a three ... Understanding the symptoms of fin rot goes a long way in ensuring that your aquarium remains healthy and balanced.

Check for any physical symptoms, as well as behavioral ... diseases and issues that could cause a betta fish to rest at the tank’s bottom: Fin rot is a typical sign of poor water quality.

Owners should also watch out for infection and diseases such as fin rot, dropsy, and swim bladder disease. While Betta fish can tolerate dirty water for a short period, long exposure can cause ...