Have an Intex SWG on our above ground pool. (8000-8400 gallons.) SWG is pretty new, got it last year. Put in about 225 pounds of salt, been running it for about 8 hours a day. Water looks nice, but did a 3 way test this week. PH level looks just right, but the chlorine level was reading exactly NOTHING! So then I took a sample of the water where it comes back into the pool, which is right after the SWG. The water coming back into the pool shows a TON of chlorine, but if you take a sample anywhere else in the pool, nothing. We dumped a gallon of bleach into it yesterday to pump up the chlorine level, same thing today. High count on the chlorine right at the inlet, NOTHING elsewhere in the pool.
And ideas what gives? It's like the chlorine just disappears as soon as it hits the pool!