Otocinclus Catfish - Otto Cat
The Otocinclus Catfish is a great addition to a peaceful planted tank and a small school of them can form a great algae cleanup crew. Otocinclus Catfish like to hang out under and on plant leaves as well as sucking on the tank glass. However, Otocinclus Catfish can be a little reclusive at times and providing places to hide will help make them feel secure. Because they can be quite shy it's a good idea to avoid keeping them with overly aggressive tank mates or other fish large enough to eat them.
 
Otto cats are primarily herbivores so you will need to supplement the Otocinclus diet with algae wafers if you think they may not be getting enough algae to eat. Some hobbyists have difficulty in keeping them and it may stem from the tank not having enough algae present for grazing, improper acclimation, lack of hiding places, high nitrates and low oxygen levels. Stay on top of your water changes to prevent nitrates from getting out of hand and provide plenty of surface agitation (air stones or power heads) for gas exchange. For even better results, add your new Otocinclus to an established tank that has already completed the aquarium nitrogen cycle.