Additional information (Wiki): The information concerns the red-algae eater Crossocheilus langei. This hardy fish is commonly found in the aquarium trade and is one of the most popular and effective tank algae cleaners. They are active and fast swimmers that will school together if kept in a group, but some individuals may display aggression to their own kind or related fishes. In general, the red-algae eater can be kept in most community tanks and are reportedly much less aggressive than similar fishes such as the Chinese algae eater or the red-tailed black shark.

They prefer water temperature range of 24–26°C, a pH range of 6.5-8.0, and a water hardness of 5-20 dH. Because the red-algae eaters are effective at controlling the tank algae, many aquarists like to place them in heavily-planted tanks with strong lightings that promote the growth of algae. Unlike other aquarium algae eater fishes, the red-algae eater is valued for their ability to eat red algae. The fish, however, are opportunistic feeders and will eat pellets and most other food, a tendency that strengthens with age.