I set up in 10 fow at the maximum. I try to keep it beteween 5 - 8 fow. If you can find an area in about 6 fow that has a patch of no weeds, say 10 foot in diameter, I would set up there. You don't want to deep, not only because of visibility, but if the fish is 11 feet down, it might be gone by the time the spear gets down that far.