I have a 14k gal salt water pool in So Cal. Our water in my city is extremely hard. Because of the hard water I get a lot of calcium build up and need to clean my SWG every 1-2 months. I recently cleaned the SWG and my ppm was at 3000-3200. However within a week it has dropped to 2300. I added 1 1/2 bags of pool salt which raised my ppm to 2800. Within a few days it has now dropped to 2300 and my check salt level light has been activated. I have auto water refill valve that comes from the street which is hard water. Could this be an issue? If so should I refill my pool when needed from a different source (my out side hose which gets soft water from my water softener). Any help is appreciated thx