bettas should be kept in warmer water around 79-82 F
2 male Bettas can not be kept together. Crowntails are the same species (Betta splendens) the only difference is in the tail shape.
They can be keep at a normal room temperature in water.
At about -7 degrees celsius.
Betta fish should be kept in water 72-82'F(22-28'C).
60 degrees or above
a tortoise should be kept warm at night.
It depends on the type of food it is
No. Male bettas can be kept in community aquariums, but should not be kept with fish that look anything like they do, or are small enough to eat. A male betta will mistake a guppy for another betta and kill it. Female bettas, however, can be kept with other "betta-like" fish without a problem.
It should be kept at room temperature. You can leave it in a closet and that will be fine
It depends on the food. But food and safety laws state dairy should be kept at 40F or below.
170 degrees
They are kept as pets and are simply there to be looked at for most owners. Some people breed them for fun others breed them for profit.