This rigs is easy to tie, and it reduces snags and lost rigs by keeping your bait off the bottom. (When you cast, the peg floats on this rig slide to to swivel-clip/hook combo, and lift it off the bottom.) Links below will lead you to the materials you need to build this catfish rig.
40-pound monofilament: http://amzn.to/2xFk5la
Lindy beads: http://amzn.to/2iPyrfx
Swivel with clip: http://amzn.to/2iRCMPr
Circle hook (6/0): http://amzn.to/2x02Z4t
3-inch peg floats: http://whiskerseeker.com/catfish-peg-floats/
As I note in the video, this rig also has the advantage of allowing you to easily switch hook size while you are fishing, in case the fish are bigger or smaller than you expect. If you are getting lots of bites but not lots of hook-ups, it might be the circle hook is too big to set. So unclip the hook and pop on a new one.
The barrel swivel at the top can be either tied or hooked to a swivel-clip on the line running to your reel. The latter is my preference, as it means I can easily remove the rig to wash and store it. (Walking to or from your fishing hole with a big rig bouncing on your rod is not good. It strains your line and sometimes snap it.)
If you do not want to tie your own Santee rig, WhiskerSeeker tackle carries them: http://whiskerseeker.com/catfish-rigs-lures-floats/
Now, you might ask: so do you use a sinker with a Santee rig? Yes, you do. The sinker can be attached to the line running to your reel (not the rig!) I prefer to clip my sinker to one of these sliders, which you install just above the swivel clip: http://amzn.to/2exPXUr You can swap different sinker sizes on with ease, depending on the current’s strength. Put a Lindy bead between the swivel-clip’s knot and the slider to protect the knot from trauma.
For those of you who have not used a slider before, one thing you need to get used to is that tightening your line after casting is different. Without a slider, you cast, let the bait and sinker sink, then close your reels’ bail and reel until the line is straight-line tight. You can’t do that here. If you try to reel taut you’ll drag your bait to the slider/sinker combination, which is not ideal. Instead, you need to reel so the line is not really slack, then close your bail.