Could the RD and Oscar live together in the 125. Im thinking of first setting up the tank with a divider so both fish can get used to eachother, the RD is pretty agressive, charging at the glass, and hes only 4 inches. He alredy bites me. So I dunno. If I keep the RD alone in the 125 (6 foot tank) would he thrive, could I add some bottom feeders such as clown loaches? Sorry for so many questins.