The Bristlenose Pleco looks very similar to the Common Pleco but with two distinct differences. The one is the bristles or tentacles that it has on its head and the other is that it does not get as large as the Common Pleco making it a brilliant option for smaller aquaria. It is also not actually a pleco but an Ancistrus species.
They are peaceful fish in general. Older males may show some aggression towards other Plecos but this should not be a problem providing that there is enough space and hiding place for everyone.
They are ideal for a community fish tank and for most species aquariums. What makes them even more ideal is the fact that they will keep algae growth inside your aquarium to a absolute minimum.
They tend to swim mainly near the bottom of the tank but when eating algae off of the glass or from plats they can cover the whole tank. They prefer well planted tanks with ornaments and caves to have enough hiding place during daytime.
They will also choose a darker area of the fish tank where they will suck onto the vertical wall of the tank and remain there for long periods of time.
When setting up a new tank it is best to wait until there is visible algae in your tank before you put Plecos in your tank. This is a nocturnal fish but they do come out during daytime, especially when feeding them bottom feeding pellets or frozen or freeze dried bloodworms they will come after the smell of the food.
To get this Pleco to breed is relatively easy. Supply them with a cave of some sort. You can construct a cave by using rocks and plants. This will give a more natural appearance. When you use a cave with a larger diameter, try to conceal the entrance somewhat by using plants or ornaments. Having one male and one female will be sufficient. Conditioning them is not really neccessary though it might help. The female will lay the eggs in the cave after which the male will fertilize them. The male will then remain in the cave to guard the eggs and to keep them well aerated by fanning them with his fins. The eggs will hatch in about five days and the fry will become free swimming after another five to ten days.
Ideal tankmates; most community, small cichlids.