Janet, I believe you're right on the air bubbles. I am a little confused about why the bubbles/foam are higher when the SWG is on since it is installed in line on the return piping. The return water runs across the SWG cell either way. I understand it produces bubbles during the chlorination process, but it still confuses me unless the cloudiness is also due a piping leak.

I tried the shotglass method and came up with a chlorine level of around 20. I will maintain that and start looking for a better test kit. The pool is still cloudy as I can only see about 24" deep. The pump pressure hasn't moved since last night's backwash so it doesn't appear to be picking up anything. I will continue to filter 24/7. Thanks for the advice, it gives me hope.