The constant adjusting will be a problem for me too. That must be the reason the guy with Linux used a pump. I wonder what will be the response form the manufacturer. As far as low level of chlorine, we have a very light bather load and as I said not much sun – lots of trees. As long that I can maintain 1 pmm level with low CYA I think it will be safe. I had in mind - if using a chlorine feeder system – to run the pump several times (5-8) a day for 1 to 2 hour intervals rather than just running it for 6-8 hours constantly. What attracted me to this device was the simplicity and if the CL levels are kept at around 1-1.5 and have a variance of +/- 0.5 I think it will be safe (please correct me if I am wrong) – given our light load of bathers.