I,ve got a 55 gallon tank that is semi-planted. I have two oto's in it (bought three but one died). My brown algea problem has come back ( i have no other type of algea in my tank) and i was wondering if anybody knows of a good pleco to go in the tank or should i just get two more oto's. I thought a very intresting looking plecxo would be fun, i saw a pleco that was green with yellow spots on it at my lfs and it was called something like a spotted mango pleco?