The lfs keeps trying to sell me a plecostomas ( I know I spelled that wrong), but I was told they relieve themselves a lot and are very messy in their own way. I also know they get huge. Is algae all that bad? I have no bottom feeders although my Discus and angels do eat whatever falls to the bottom. Do I need catfish too? I just learned you have to have corys in groups and all the other cats I see get too big. Is it dire to have algae eaters and cats if you are careful not to over feed. My fish pick at the bottom directly after feeding time. I don't really want any more than the four fish I have unless its required. I don't plan on upgrading to a larger tank for another six months.