So, a three-inch betta fish would need at least ... 5. Quarantining Sick Fish Could Save Them As noted, fin rot is a result of stress suppressing the immune system’s response to infections ...

Here are some common diseases and issues that could cause a betta fish to rest at the tank’s bottom: Fin rot is a typical ...

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 ...