I acquired a 48x12x17 tank and am intending to turn it into a sump. My idea is to run it thought mech filtration, then to a moving bed bio chamber on to a wet/dry trickle then back to the tank. What are your thoughts and or opinions on this set up and what kind of return flow rate would be best, low flow for contact or high flow for turnover. Tank has 2 hystrix and a dozen geos. Thanks guys!