I'm thinking that I might not be running my pump fast enough for my SWG to be totally efficient. The "enough flow" light is set. Without solar, I'm running at 25GPM.
However, I notice that I see what I assume are little chlorine bubbles coming out of the return lines and bubbling to the surface, so I assume this is chlorine which is not dissolved in the water.
So that got me to thinking that maybe my SWG would be a bit more effective if I ramped up my pump, but I'd rather run slower to save on my electric bill. Last summer when I ran my pumps much harder and my bill was higher, I don't recall seeing these bubbles.