So I have a 35,000 Gal indoor play pool running a SWG and a stenner pump liquid chlorine feeder. The SWG is currently down (awaiting cell replacement) so I have been using my liquichlor chemical feeder pump which was working fine the last week. Yesterday my FC/TC levels just dropped and will not rise up much at all when leaving my chlorine pump on for hour or so. I have ruled out the stenner pump chlorine feeder being the issue, chlorine is reaching my return line. I am thinking about shocking the pool tonight to bring up the levels. Here are my latest test results: FC 0.10 TC .30 PH 7.8 ALK 120 CYA 14 CH 280