Bristlenose Catfish are algae eating Catfish of the genus Ancistrus. There are about 60 species in this genus and it is uncertain which species the common aquarium Bristlenose catfish comes from. It may be Ancistrus cirrhosus but it is very likely to be a hybrid of two or more related species.The Bristlenose Catfish species come from South America, mostly from the tropics although some species are found outside the actual tropics.SizeMales grow to about 15cm (6 inches) while females get to a little less than this at about 12 cm (5 inches).Water ConditionsThe Bristlenose Catfish is quite flexible in its water requirements. It can live in water ranging from soft to hard, with a Gh range of from 2 to 20. Acid, neutral or alkaline pH all seem OK, although I would not subject this fish to extremes.Although this is a tropical fish, it is not very tolerant of high temperatures. The generally recommended temperature range is from 23 to 27 degrees C (73 to 81 degrees F) However, a prolonged temperature of 30 degrees C (86 degrees F) will cause these fish to die while they seem happy at well below the 23 degrees normally recommended minimum temperature. Personally I would suggest a lower temperature than the upper part of the normally recommended range.A water current from a power filter is a good idea. Avoid excessive levels of ammonia, nitrites and nitrates.
Some aquarium safe wood is recommended.