Hello. I've acquired a 29 gallon tank that is 312X18. It is filtered with a Tetra Whisper 30 and an undergravel filter without powerheads. I have already stocked it with 6 Redeye tetras, 4 Black Phantom Tetras, 3 Cory cats, and 1 small rainbow shark. I am planning on adding an Aquaclear 50 (200) to this system. I do 25% waterchanges every week regardless of the water condition. I want to add 7 tiger barbs and 6 Serpae or Rummy-nose tetras. I would also like to throw in 2-3 small clown loaches. I know this generally overloads a 29 gallon tank. However, with the added filtration, and the 25% weekly water changes, I think I can accommodate the fish I desire. Am I wrong? :?