Pentair Model 320 auto chlorine bromine in line feeder. On-off knob at 5. My husband noticed yesterday there wasn't any tablets in it. We've had a lot going on for the last two weeks. He put four tablets in the feeder yesterday. We've ran the pool two full 8 hour cycles. This morning the chlorine levels were zero with two different testers.
I just tested again seven hours later that the pool has been running. It's still zero.
I'm wondering if another knob got turned when the lawn guys came or if my husband turned knobs he wasn't supposed to. We moved here 11 months ago. This is our first pool. It came with the house.
Thanks in advance.