I have seen filter setups where people have an overflow that directs into a tank BELOW the aquarium, then it runs through a wet/dry filter and the pump lifts the water back to the aquarium. Is there an issue with using a powerhead meant for a foam filter and such, to lift the water up and out of the aquarium to a wet/dry filter located above the tank? Then the water will trickle down and drain back into the tank via a bulkhead fitting and plastic tubing. The reason I want to do this is I have a waterproof ammo can that I think I could find trays to fit in or maybe even just use bags, then the trays could be filled with my media, and a drain could be mounted in the bottom of the ammo can. This way there's no chance of a bin overflowing or leaking, and if the power goes out, I wouldn't have to ever worry about an overflow siphoning, and for that matter, wouldn't have to build an overflow. The aquarium is a 30 gallon, long style. We have 11 cory catfish, and 10 zebra danios along with some live plants. The tank is cycled and seems healthy after only 3 weeks, cheating and using a precycled 5 gallon biofilter seeded in a well established tank. The tank is on a heavy duty metal wire shelf, with a piece of 1/2" plywood to spread the load of the aquarium. There's a plastic tote of fish stuff and a tote with a gallon hobo-wine jug with sugar water and yeast I have bubbling through a homemade bubble counter / puke tank, and I just prefer that being below the fish tank. Also, as part of my plan, I want to ditch the current light fixture, a simple flourescent hood with a 24 inch bulb, and get a shop light with a 30 inch or 36 inch pair of bulbs to kick out some more light for the plants. I'll just hang the shop light underneath the shelf above the tank.