Betta Tank Size
Hi I'm a animal protection officer and the question
I have is how much water and space does a bata fish need to be
kepted comfortable. I have seen bata's kepted in very small
containers with just enough water to cover the fish. As I
understand it a general rule of thumb is 1" of fish per gallon of
water so a 10 gallon tank you can keep 10 inches of fish I think.
Betta splendens does not need to follow the rule of tank size
because this species can gulp air. The rule you state refers to oxygen need
and this fish, amoung others such as goldfish and carp, can use air for supplemental
oxygen. Most other fresh water fish are not so adaptive.
Bettas actually use air bubbles to build their nests.
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Update: June 2012