I have a 1 foot long pleco and he keeps my 350 gallon aquarium absolutely CLEAN. I got him when he was about 3 inches long and almost 5 years later he is huge. Best investment I ever made for my aquarium! No algae, no bacterial growths, no food sitting on the bottom ever, he is great. He is very mellow too. Gets along well with all fish that I have had.Trod673 said:Is this Algae? I am currently cycling my tank, and I'm not sure what this is... I'm hoping it's algae, because I want to have a pleco....