jst startin' out to pair my male Blue Dragon zz to my female faded zz.. is it ok to put both of them in a same tank without divider? my Blue Dragon is much bigger 'bout 9 inches than my faded zz whose 7 inches... im afraid that they will hurt each other... also, i heard that the ideal temp is 30c... what other things should i do? any advise? tnx.