Just moved from the city to a 5-acre property in rural MO. There will be many more questions to come for sure. Our septic system has a 4-inch tube for chlorination, but there doesn't appear to be a chlorination tube to put the tablets into. My question is about how to accomplish this. I have seen chlorine feeder tubes that you load the "cakes" into then that goes into the 4-inch access tube. Most of the tablet tubes I have seen are 24" long which would not even reach down to the water level in my tank. I put a stick down to get a measurement, and think I felt gravel on the bottom of this tank (is that normal?). I am assuming the tablets need to be submerged, but is it just below the water level? Is it to the bottom? (that seems like it would be covering multiple tablets and not proper dispersal). Further, what keeps the tube from being lost down the bigger pipe? Need some basic education here. I haven't been able to find enough detailed information and I would like to see how others are doing this.