With at least 3 I had two and they fought. Reply from Pete S: Another example aquarium bottom feeder neon tetras who only grow to be a little over an inch. The Cory species from the Catfish family is a great addition to an aquarium.
Some are far more active and require larger tanks compared to a bigger but less active fish. The goal is to make sure the bottom feeders get enough food while at the same time do not overfeed other fish in the same aquarium.
Often it does not work out and the girls will injure or kill each other. These fish love to be in groups and really will show passion towards each other with their movements. Bottom feeders have a much better chance of eating it.
Most of these fish if not all.. Some are far more active and require larger tanks compared to a bigger but less active fish.