Here are the facts.
I have an appx 20,000 square foot pool
I have an inline Pentair320 Chlorine / Bromine Chemical Feeder
Bought the pool with this unit in place it is after everything else just before the feed back into the pool.
Has worked fine for almost a year, the last 3 months it is not working.
Every time in the last 3 months I test the chlorine level is down at 0.0 and does not even begin to turn purple.
Every time I open up the unit from the top the pucks are gone and I have to add more (last two times) before 11 pucks used to last 1-2 months.
Its the same brand and type of pucks as a year ago (I bought a huge tub).
Every time I open it water does gurgle out of the line so the main tube is being filled with water.
When it was working at the 4 setting it was feeding just fine and the chlorine level was just fine. I tried moving it up to almost the 5 setting for two weeks no change in the no purple 0.0
Why is my feeder using up the pucks but my water is always testing at no chlorine unless I manually add more.
I figure I have good enough flow because the water feature is working and the water heater is not shutting off. I did clean the DE filter with a backwash last month just in case.
Do these units go bad? Do I need to buy a new one? I just figured its a tube with a flow control knob attached to it so it shouldn't ever be a problem should it be?
Do chlorine tablets go bad if left in a garage in a tub and not wet? Is it these tabs and I just need to buy fresh ones? Very confused any information you can provide would be great.