One of the simplest rigs i use is this silt rig. A heavy lead, a short braided hooklink and a balanced popup. The whole thing is designed to draw the lead and hooklink down into the silt leaving only the balanced popup showing. The dissolvable foam ensures that it will be set right after pulling the rig into the silt. You can easily judge this when you pull out the rig or catch a fish! On the pull out you will notice the rig 'plucks' as it comes out of the silt. I use this mostly on gravel pits where the silt has collected up the sides of deviations in the lake bed. Like anything you get a feel for it after a number of casts. It can be a real winner!