i went to pool store to have my water tested, he said i needed about 3 bags of salt. well when my salt generator said check salt, i went back and he gave me the salt strips to check my self. the salt level was around the 9 level on the strips. obviously way too high. i first drained the pool 1/3 filled, still too high, then 1/2 plus all of spa. reading around 6.5 now. so drained another 1/3 plus all of spa and reading is still around 5. is this normal? also each time i test my chemicals after the fill my ch and ph test are spot on. would not the emptying and filling with clean water dilute the chemicals?