I have a 29 gallon tank with 1 blue gourami, 2 mickey mouse platys, and 2 female mollies. I previously had a red-tailed shark with them but he died a few weeks ago. Since he died the tank has become dirtier faster. I read that red tailed sharks shouldn't go with community fish. Is that true? And if it is what algae eater is good for a community aquarium? I don't want one that gets really big or is really ugly. Is there one?