I am a new pool owner. I had been using a pool service company for a couple of months but finally found the time to read up and canceled the service about two weeks ago. The pool has a Rainbow 320 chlorinator which was full with tabs when I took over. The chlorinator was set to 4/5. My intent was to let it go empty and use liquid chlorine instead. When I started off two weeks ago, the FC level was only 0.6 so I added liquid chlorine to bring it up to 3. I noticed that the pool drops FC at a rate of 0.5 or so every day. I am bringing the FC level back via liquid chlorine from time to time. I was surprised that the tabs did not allow the pool to maintain its chlorine level. When I checked the chlorinator today, I noticed that only 1.5 tabs had been consumed after 12 days running at 4/5. The topmost tab looked like it was brand new. I would have expected much more usage but it explains why I need to add liquid chlorine from time to time. I turned the pump back on and allowed the chlorinator to fill again. Water is coming into it fine. I set the chlorinator to the max settings of 5 at this point. I suspect that flow is somehow restricted causing the tabs to be not adequately consumed. Water chemistry of the pool is just fine. I am adding about 1 gallon 10% liquid chlorine per week to maintain the FC level My pool has about 20,000 gallons.
This week my next step is to remove all tabs completely and see if anything is clogged. Does anyone have ideas what could be going on? My intent is not use the chlorinator, however, we do go on vacation so I'd like to be able to rely on it when needed. I should add my latest test results: FC 2 CC .4 ph 7.6 ALK 120 CH 250 CYA 0.
This week my next step is to remove all tabs completely and see if anything is clogged. Does anyone have ideas what could be going on? My intent is not use the chlorinator, however, we do go on vacation so I'd like to be able to rely on it when needed. I should add my latest test results: FC 2 CC .4 ph 7.6 ALK 120 CH 250 CYA 0.
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