I have a Pentair IC40 in my pool. When I started up my pool this summer I cleaned the plates so they should be good and clean for the start of the year. The salt reading that the SWG generates never matches what I get from doing the drop test in my pool. I just tested and got 3000 ppm with the drop test but the unit is measuring 4200. I just added salt yesterday; do I wait another few days and redo the drop test? Is one test more accurate? Which numbers do I use to determine if I should add more salt to the pool?
Salt level
- Thread starter TX Pool
- Start date
If you are referring to the Taylor K1766 as the drop test for salt level then that is the gold standard. Rely on that as the most accurate. however, be aware that each drop is 200ppm so any value could be +/- 200ppm.
Most every SWCG uses some sort of electronics to do a calculated salt level. The goal is to always measure salt level with the Taylor K1766 drop test. So long as your SWCG is happy - not reading a Low Salt or High Salt level then all is good to go.
Mixing of salt chould take 24 hrs of continuous pump runnng. So always wait a day or 2 to verify salt level before adding more.
Same battle I’ve had but with Hayward. It’s always been about 400 higher on the cell compared to the Taylor test. I have always followed the Taylor and have always been fine as far as chlorine production. This year it was a little more of a difference but I’m still following Taylor test and I’ve had lower but still in range levels. FC has been fine and water has been clear so far. The machine is good for a quick look but I would still follow Taylor test as your true salt level.
