i am not getting any chlorine reading when i test water for chlorine with reagent, nor do i smell any chlorine in pool. chlorine feeder (pentair model 300) is only 2 months old and is full of tabs. pump and all other equipment is running well. anyone know what this could be? could the feeder possibly be clogged? i run pump from 8am to 12mid daily. feeder has been set to maximum flow for last 3 days due to lack of chlorine. I have added 4 cups of powdered chlorine yesterday in skimmer. i just tested and got just a barely yellowing of color i would say about 0.1.