That all depends on where the fish are a how deep the water is. You can do it in 2ft. Of water and as deep as you want. That being said I mostly spider rig pre. Spawn in. 20 to 30 ft. Of water an I'm moving pretty fast to cover water. If I'm marketing fish 10 ft . down I let out 12 feet from the jig because I'm moving that will put my jig in 9 or 10 feet. If you're not moving fast say .5 MPh. Put your jig at or just above the fish. You going to get all kinds of answers because everyone does it a little different. Just try different things and see what works for you.