A lot of new catfish species of Corydoras genus has appeared recently. Pygmy corydoras (Corydoras pygmaeus) is one of them. It is an amazing, small fish, that got its name due to its tiny size. This species are not as brightly colored as other fishes, but its size is its sufficient advantage. It allows keeping pygmy corydoras even in nano tanks.
Otocinclus or dwarf sucking catfish (Macrotocinclus affinis, ex. Otocinclus affinis) are commonly called “oto catfish” or “oto” is a small and not bright fish – however, it’s one of the most efficient algae eaters in a tank.
That catfish together with Caridina japonica shrimp are able to keep you tank and all plants in it clean and tidy.
Bristlenose catfish or bristlenose pleco (Ancistrus dolichopterus) is one of the most spread species in the family Loricariidae, it’s a very popular tank fish. Both beginners and experienced aquarists know about it and keep it.
Ancistrus has caught such close interest due to its features: the fish is called a “tank cleaner”, it’s easy in care, its behavior is quite extraordinary, its cupule-mouth structure makes it remarkably different from a number of other fishes.
Sailfin pleco (Pterygoplichthys gibbiceps) is a kind of freshwater ray-finned fishes of Loricariidae family. This is a strong fish that eats huge amounts of algae. A couple of adult species can keep even large tanks clean.
If a tank is rather large (of more than 70 gallons capacity) pleco size can be up to 30-35 cm long.