hey guys, im getting a 30 gallon long tank and want to run the most efficient sytem i can as far as filtration I was thinking to get 2 pengiun power filters (with bio wheels)each rated for 150gph and hang one on each end of the tank. my reasoning - 2 filters= better filtration -at 150 gph each they wont be strong enough to suck up fish - more water movement= for oxygenation for invertebra such as crayfish - rotate swapping filters to keep from having to re-cycle the tank my questions are 1. is this an overkill on filtering? 2. will the additional filtering bring down the amount of bacteria to a dangerous level? 3. with this setup along with a few bottem dwellers will it be easier to upkeep the tank? 4. how will plants react with the additional oxygen? will it displace available CO2? THANKS!!!