Chinese algae eater (Gyrinocheilus aymonieri)

Siamese algae eater (Crossocheilus siamensis)

This hardy pet fish is commonly found in the aquarium trade and is one of the most popular and effective algae eater fish.

Flying fox (Epalzeorhynchos kalopterus)

The pet fish is known to eat green algae. It is also known as kuonobarbi in the aquarium trade and is sometimes mistakenly referred to as the Siamese Algae Eater.

Golden Oto (Macrotocinclus affinis, formerly Otocinclus affinis)

It is one of the smallest known suckermouth catfish, often called a 'dwarf oto'. Typically found in Southeast Brazil, this herbivorous, rheophilic, bottom-feeder only grows to around 1.5 inches in length. This small pet fish is often used for the purpose of controlling algae in small home aquariums.

Sailfin Pleco (Pterygoplichthys gibbiceps)

This pet fish is extremely popular in the aquarium, due to its unusual appearance and its ability to eat algae; the bane of all aquarists. In general this algae eater fish is peaceful towards other fish though territorial disputes arise with other plecos. Though not nocturnal they are more active at night and will spend daylight hours 'hiding' in a secluded location.

Panaque (Panaque nigrolineatus)

Their main demand is for a mixed diet including green algae, fresh vegetables such as carrots, courgettes, and spinach, and clean bogwood. In the wild, this pet fish feeds almost entirely on wood and algae.

American flagfish (Jordanella floridae) 

These pet fish make quick work of hair algae and they may also eat plants in a planted aquarium.

Guppy (Poecilia reticulata)

This algae eater fish also known as the millionfish, one of the most popular freshwater aquarium species in the world. This pet fish is a small member of the Poecilidae family (females 4-6 centimetres long, males 2½–3½ centimetres long) and like all other members of the family, is live-bearing.

Kissing gourami (Helostoma temminckii)

This beautiful pet fish may be useful as algae eater fish to control algae growth. To prevent digging and to present enough surface area for algae growth, the substrate should consist of large-diameter gravel and stones. The aquarium's back glass should not be cleaned during regular maintenance, as the gouramis will feed on the algae grown there. Most plants will not survive the fish's grazing, so inedible plants such as Java fern and Java moss are recommended.

Kribensis (Pelvicachromis pulcher)

A study by Nwadiaro (1985) of 161 individuals showed that their main food items were diatoms, green algae, pieces of higher plants along with blue-green algae. It makes the beautiful pet fish as an effective algae eater fish.