I have an auto chlorinator we use primarily for when on vacation, throw in several tri-chlor pucks and forget about it. We come back and all is well. However I last filled it a few weeks ago and as I am watching the chlorine level with my test strips, it's still at normal level (around 5ppm). So with the pump off, I spin open the top and there are still a few half disolved pucks with very low water level (oh and it smells strong!) So with the cover off, it refills and then I twist back on the top.
Is it normal that the water level gets so low, and it works for so long? btw, I have the dial set to 4.
I have the middle one: