This tank can only keep it alive now. If it is not well preserved, the fish should be at 28 degrees. This water tank cannot be heated.

After changing water frequently, fish can't adapt to the quality and temperature of new water and get sick easily. If you don't change it frequently, harmful substances will accumulate, the water quality will deteriorate and you will get sick easily.

In a word, it is not suitable to keep this kind of fish in a fish tank that can't install a filtration system and keep the water temperature stable.