There is no difference between a plecocostomus and an algae eater because the former belongs to the fish species that eats algae, whereas the latter covers a wide range of algae eating species such as Black Mollies, Otocinclus specie, Siamese Algae Eater, Amano Shrimp and Plecostomus specie, which are included in this classification. As far as advantages of this algae eating species is that the Plecostomus has a longer lifespan which would live between 10 to 15 years and can grow much bigger size, whereas the other algae eating fish are small in sizes and has a shorter life span. Furthermore, the Plecostomus is a much more aggressive compared to other algae eating species.
With regards to tank cleaning, the plecostomus are much more helpful when they are still small in size, "since the larger varieties tend to eat the plant right along with the algae," while other algae eating species such as Otocinclus "are best kept in schools due to their small size. One per 10 gallons is a useful rule of thumb.
Algae eater is a term used to refer to fish that feed primarily from the algae in your tank. This name is given to the group of fish that have characteristics of the group, so algae eater is a type of fish, not the name of a fish. There are several algae eaters that are commonly used in tanks.
These are Ancistrus, Dwarf otocinclus, Siamese algae eater , Chinese algae eater and of course the Plecocostomus. When you are choosing your next algae eater its important to keep in mind that while some can survive on what they find within your aquarium, other may need algae supplements that you can find in the form of wafers. As many of them get older, the need for additional food supplies grows.
However the lack f distinction is often due to the fact that the most popular algae eater is the Plecocostomus, and the others are not as well known.
A plecocostomus is one type of algae eater, it is also known as a weather loach, this is because when a storm is imminent, the plecocostomus usually becomes very active and swims rapidly around the aquarium, sometime creating havoc by sending rocks and plants flying with his tail! This type of algae eater can grow to be quite large, so needs to be kept in a very large fish tank of around 300 litres. As well as algae, plecostomus likes to eat a variety green foods, lettuce, crushed frozen peas, cucumbers and vegetable-based flake foods.
They need to be kept in a water temperature of 25c or 78f. It may be that plecostomus is therefore not the most suitable type of algae eater for your aquarium. There are several other kinds, including some very attractive snails, so it might be an idea to go to your local aquarium store and describe the size and type of set up that you have and ask for their advice on choosing the best one for your fish tank.
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