While buying some refills for dpd powder and dpd-FAS reagent from tfttestkits, I decided to buy the Aquacheck salt strips. I don't have a saltwater pool and I have never added an ounce of salt. I am thinking about adding a SWG next year, but wanted to get an idea of my base salt level due to my use of liquid chlorine over the last couple of years.
The white peak on the test strip reached 4.4, which according to the chart on the back of the bottle is a salt level of 1630 ppm.
Does this level seem in the range of being reasonable considering:
1. bought house in early 2006.
2. have a cartridge filter - so no backwashing
3. replaced 40% of water last year due to high CYA
4. Typically use 3-5 gallons of 10% chlorine per week in the summer, dropping to 1-2 gallons per month in the winter (if that).
I don't typically notice any whitish salt deposits on the deck after the water evaporates, although we have an aggregate deck so it might be really hard to notice.
I'm just having a hard time with the fact that I'm already 50% of the way to a saltwater pool without having added any salt. (I realize that adding liquid chlorine adds some salt for every ppm of chlorine added.)
I've always been a bit worried about the extra corrosion going from a freshwater pool to a saltwater pool, but if I'm really at 1630 ppm, roughly doubling that number to 3500 ppm doesn't seem so scary anymore.