siamese fighting fish dietWhen the sun isn’t shining, a room that is just heated by the sun gets cold. This isn’t applicable. For combating fish, bound very small aquariums are sold. These are best suited to areas with a hot environment. They aren’t acceptable for combating fish in the winter in temperate countries unless they may be able to be kept in a spot that doesn’t become chilly. Many of these aquariums are too small to use a typical aquarium heater.