I am getting a Pentair IC-40 SWG installed later today. The IC-40 has LED readouts to say whether the salt concentration is low or sufficient, but nothing to say if excessive. First question is whether I can rely on the SWG itself to make that determination or must I buy an actual tester? I live in Vegas where I don't expect to see the salt ever get diluted from heavy rainfall. I figured the best test would be if the IC-40 shows good and the chlorine level is good, the salt level must be good.
Also, the bid included 10 bags of salt to my 19,000 gallon pool "to raise salinity for salt system." Size of bags is unknown. I just went through a drain and refill to get rid of excess calcium and CYA, so I don't want to go over on salt and have to drain and refill again to get rid of excess. Therefore I am planning to tell the installer to only add 5 bags of salt to start with, and that I'd add one bag at a time after that until the IC-40 tells me that the salt is sufficient. Anyone see a problem with that?
Another unknown is that I just drained and replaced 75% of my pool water with soft water. My CH this morning was down to 121. That's too low if it stays there, but it's still adjusting and I don't know how the salt will affect things. If it stays low, I'll actually be adding calcium to get it over 200. Without the excessive calcium in the water, the soft water feeder should be able to keep calcium under control and let the SWG last a long time.