The rainbow shark is a cleaner fish. Clean fish can eat algae, moss and animal debris in the tank, and even some residual food, often as tool fish in the tank. Rainbow sharks are omnivorous fish, and most of their food can be used for feeding.
But when feeding, they should be fed some food, so that they can grow well. They like to eat foods such as earthworms, red worms, shrimps, small fish, fruits and vegetables. When breeding, it is best to feed them every day. Only when they eat well and get more nutrition, can they grow healthily.
Rainbow sharks can clean fish tanks. Because the rainbow shark usually eats live bait, but it can also eat algae and moss growing in the fish tank, and can also eat some food residues and fish debris, which can keep the water in the fish tank clean, and can also keep the fish tank clean, so from this point of view, the rainbow shark can clean the tank.