I had Leslie's test our water - now I know to steer clear of them - however, they said my salt level is 2689 and I need to add three bags. My aqualink app says the salt is 3400. And I used my TF-Pro test kit to measure the salt and I came up with 3600. Is the test from the kit known to be the most accurate? I was told the aqualink is not accurate - is this true? I'm thinking I don't need to add any salt - thoughts? Thank you!