"These tanks are good for bettas, Just keep it away from any cold vents. Bettas like warm water appx 75-86F. My bettas seem to do better in tanks 1/2 gallon to a gallon. I did stick them into larger tanks in the past but for some reason they get scared and dont like it. I know that bigger is better sometimes but in my case it was not. These are fish that are breed in small ponds and rice patties. But anything smaller then this is NOT OK for them. Smaller tanks sometimes mean more cleaning the water thou, but if your willing for commit to this type of tank without filtration it will be ok. Just becareful with them because they can become stressed from the water changes. Bettas originate in the shallow waters in Thailand (formerly called Siam, hence their name sianese fighting fish), Indonesia, Malaysia, Vietnam, and parts of China. They proliferate rice paddies, shallow ponds, and even slow moving streams."
