You should never keep a betta fish in a tank any smaller than 5 gallons, but larger is better. Something between 15-20 gallons is ideal for a betta fish and a handful of suitable tankmates.

In pet stores, the popular fish are often kept in small tanks or plastic bags, giving them insufficient space. Read more at ...

examined how tank size and furnishings impact the behavior of Siamese fighting fish (Betta splendens), known for their striking colors and flowing fins. Thailand alone exported about 20 million ...