We have an Intex Ultraframe 16' pool with a sand filter and a SWG. We have struggled to get the chemicals levels to stabilize all summer, but recently our chlorine (which was always ok) went to zero. We are running the SWG for 2-4 hours a day. When the chlorine bottomed out, we added bleach and it is up to 1 right now. We will add more bleach to get it up to where it is supposed to be, but does this mean our SWG isn't working? It still turns on and sounds like it is working and the flow into the pool is good. How do we know? And if it did go out, what do we do until we can get a new one set up so that we don't screw up the salt water chemicals more?