I fished deep water perch for years out in Utah.Up to 50 feet deep. Best rig that I used is described here: About two feet up tie on a jig of your choice, one foot down from that you can either use a flasher, which is just a small shiny spoon with some weight to it, or a splitshot with a 1/4 OZ bell sinker above it. A foot below that tie on another jig. Bait both with waxies or cut bait . Cut bait would be a small perch. When you lower this rig to the bottom with the weight, you can tell just how much to raise it off the bottom when the weight hits. With a spoon or flasher it may be more difficult to tell when it has hit bottom. Also the spoon or flashers tend to flutter off to the side, giving an inaccurate depth. I always used a glow rat finkee on the bottom and a pinkee rat finkee on the top.Keep the bottom jig about an inch off the bottom. Either jig will tell you where they are biting right on bottom or,if up off the bottom you will get them on the top jig. If you get them on the top jig, raise the bottom jig up about a foot and you can start to get doubles.This rig gets the bait down fast and you dont have to wait to try and pull line off to get the bait down quicker.