I'm starting my 4 season with a SWG pool and mid last season I started having trouble keeping FC in the pool. Prior, my pool was basically maintenance free, very easy to balance and keep FC. All signs lead to my salt cell going bad, however if I capture water coming right from the returns it has quite a bit of chlorine in it (hard to guess as my tester can't read higher than 3.x FC....it is one of the standard liquid test kits like this one: http://tinyurl.com/l8enrkh).
Do salt cell's become extremely inefficient as they are dying or do they just up and die one day? Below are my readings:
CH: 115 (I added 20+ lbs of CH)
CYA: 2 (this wasn't the case a few days ago so I will need to up this big time, pool school says between 70-80, really that high?)
I also just added some clarifier today if that matters (my water was blue, but a little cloudy).