There is a solution. Same as liquids in reservoirs. Use multiple rails in the chlorine room (as many as your throughput needs) Then have a conveyor shut off valve at the end of each. Have a timer on each so that the slime stay on the rail in the chlorine room long enough to kill all the germs which should be about half a cycle. Then open the shut off for a number of seconds equal to the length of the rail in chlorine. Rinse and repeat. You now have a slime on rails germ killer. that do