Otto, Oto, or sometimes Dwarf Sucker, is a good algae-eater for small tanks, and large if enough Ottos are used. Because of the Ottos size it is able to get the hard to reach places missed by larger algae eaters. Also because of the Ottos size they will not dig up shallow rooted plants. Otocinclus affinis stay to the bottom and mid levels in the tank. They usually are not very active during the day. At night they swim all around, and eat algae they find on the way.

Otto's are very sensitive to pollution and need oxygen rich water, therefore the tank should be filtered well.

A planted tank with rocks and driftwood will provide plenty of hiding spaces to prevent the fish from becoming stressed. This algae eater will not eat plants, making it an ideal candidate for the planted aquarium.

Females are decidedly broader and rounder in appearance then males. I've read were some say Ottos are egg scatterers, and other say they lay adhesive eggs on rocks, broad leaved plants and on the aquarium glass. I can not tell you for sure as mine have never laid any eggs that I know of. Young hatch in 2-4 days.

Ottos will eat algae, algae wafers, cucumbers, lettuce and zucchini.