i had one for about 6-7 months,and it never ate algae. it ate krill,brine shrimp, and whatever else i fed it and it always had a fat belly. It was very easy to take care of did nothing different from my other fish. But i came home from work the other day and it was on the bottom dead no signs of stress or nothing it ate fine the day before and everything. But overall it seemed like a hardy fish.