i have 2 55g aquariums stacked. i was wanting to redo the plumbing because it was used when i got it and just doesnt look safe. the way it was setup when i got it was each aquarium drained into 2 different 10g aquariums with mag 5's for the return pumps i currently have the top tank draining into the bottom tank and the bottom tank draining into the sump and one mag 5 returning it. does that seem like a good setup is the pump enough? all the drains are 1" pvc and the return is 3/4 flexible hose.