Often mispronounced as AUTO, the correct way to refer to this fish is OTO with an O sound. This is a popular fish known by most aquarium hobbyists old and new, and ideal for pros and newbies.
The Otocinclus Algae Eating fish originated in South America and grows up to 2 inches MAX in a large aquarium, but usually much smaller. It’s main source of food is Green Hair or Filamentous algae, some brown algae, algae on plants, glass and rocks. Should be kept in groups for best results. This fish is very peaceful and be house with any type of community fish.
For stocking purposes, we suggest 1 Otocinclus Algae Eater per 2 gallons of water, depending on how many plants you have.