try this aquaticeco.com
search bio reactor on home page
product by Clearwater LSB2.5
i will be running a fluval fx5 and a gravity feed wet/dry on a 300gal rubber maid
i am just completing a fish room and i am planing a breeding project for fw stingrays.
i am not sure what exactly that i am going to do so i am researching options i will start with 300 gal looking into more ponds or custom tanks. filtration is what i am mostly interested in never dealt with keeping fish in such a large volume of water before. central filtration, individual filtration, what kind of filtration is best for my needs so on and so on. might be able to complete room this coming week i will be glade to see some water down there it has been a long time coming .