hi david. Newb to the forum, so take my comments with a grain of salt (pun intended), but one thing i have learned after 10 years with a salt pool is to
1) never trust what the panel says for salt level
2) never trust what the store says for salt level
3) test strips are hit or miss - i/ve had them read as much as 1000ppm off
4) accurate salt levels can only be obtained by chemical titration (Taylor K-1766)
I know everyone seems to complain about the "mad scientist" test kits, but there are a couple that are essential in my opinion. This is kit is one of them - and it's easy to use.