sorry, I gave incorrect info before when I said what the tech did when he came out. All he did was add acid to bring the PH down......VOILA.....THE Chlorine is now 10. (not from adding chlorine) Yes, too high, but with all the sun / heat we are having here, it will come down and we brought the output on the SWG down a hair.
The tech also added stabilizer.....he said don't touch anything until I come back (he'll be back Wed.) I think the problem was the PH was too high and the unit wasn't producing chlorine as someone mentioned.
We weren't adding enough acid weekly....only like 1/4 gall. Wasn't enough. We think that 3/4 gallon will do it....but not touching it now till he comes back to check.