If you give rainbowfish lots of plant matter, don't overcrowd them, and do big regular water changes and gravel cleans, they don't normally get sick unless they have TB. Even then they will be healthy until their organ/s pop and they die.
The biggest killer of rainbowfish in people's tanks is overcrowding and a dirty tank, gravel and filter, which allows protozoan parasites to take over and harm the fish.
The biggest killer of rainbowfish in people's tanks is overcrowding and a dirty tank, gravel and filter, which allows protozoan parasites to take over and harm the fish.
Last edited: