The first time I saw a fluval Edge, I had to have it. I thought for a while about drilling it, however I realized it would be easier to cut some short teeth into the plastic rim and build an external overflow. In the spirit of expirimenting I decided to attach the AquaClear 20 filter around where I cut the teeth and drilled a 3/4" bulk head for the drain into the bottom. The shorter the teeth in the rim, the higher level of water you can attain. Considering air is the enemy in an edge (due to constant removal with a magnet) I figured my return pump should be fairly low gph. So I went with a Maxi jet 600 for the return from a 15 gal sump& submerged the return nozzle well below the surface. This has to be one of the easiest Nano's to "drill" since no glass drilling is required. A simple Dremel is all you need. Will post Photo's soon. Good luck!
