There is so much information on this site that it's a bit daunting to a guy like me who needs a simpler instruction of what to do.
I recently bought a home in South Florida with an in-ground pool and a Jandy SWG (The AquaPure 700). I am convinced the previous owner didn't properly care for it. He has left me with a big (read: expensive) repair job. For instance, he told me that the pool store was wrong and that his sensor was right with regard to salt concentration. But it was he who was wrong; multiple tests done by different parties revelaed the salt was too low and he was running the SWG too high for such little salt. He also bragged about it being a "maintenance-free pool." This I knew was baloney, but learned he barely ever cleaned the filter grids.
The pool and SWG system were installed two years ago. (I have the receipt and work site info from the installer) but I immediately had to replace the flow sensor and the multiplex board. I clean the filter (Jandy DEV 45) and the AqauPure (with an 'acid bath') as per manufacturer recommendations, but my pool never seems to chlorinate enough.
I had been running it at 70% for six hours. I turned it up to 85% for eight hours. My salt and CYA levels are fine. I keep my pH balanced. My total alkalinity and total dissolved solids are within the expected ranges. I seem to have a slightly high hardness level. But whatever chlorine is made during the day (which is never enough) is gone by morning.
(I know that chlorine is being produced in some regard, because I can fill up the test tube with water coming out of the return jet and the chlorine level is much higher than from the deep end of the pool).
I'm shocking every one to two weeks just to sanitize the pool for me, my family, and guests.
Am I not running the SWG enough? Is it due to the summer sun/heat? (We're already in the high 80's/low 90's F here.) Is my SWG busted due to the previous owner's incompetence? Should I completely drain and refill to fix the calcium hardness level? Does water hardness impede the SWG?
Thank you, in advance, for your simple advice. I'm apparently not smart enough to figure this out on my own! The local pool guys are helpful within their abilities. And while the pool service who has been helping me with the other issues is very accommodating, they charge an arm-and-a-leg for their time.