Okay so I'm about to move into my own place and I'm thinking about upgrading from a 180 to a 300 (8' x 2.5' x 2'). Currently my 5x datnoids are 8-10". Tankmates will be (hopefully) a FATF (12" max), 3x red tail payara (10" max), and an arowana, Assuming tank is overfiltered, could I fit some more dats in there or am I fully stock?