(setup for a 75 gallon aquarium) This is a filtration system that has worked wondors for me so I thought I'd share. Start out with a canister filter that will hold foam and carbon (I use a Fluval 404). Hook it up like normal but run the plastic tubeing into a box power filter (I used a aqua clear 400). Remove the impellar housing and fill the entire filter with gravel. Make shure the hose pushes water out at the bottom of the gravel. For even beter results plant a plant in the gravel with a small grow light above it. The plant absorbs nitrate and nitrite for perfactly clean water!
