I just obtained an Aquatron Cobia XL Pool Robot. In anticipation of using this new gadget, I went and bought a truck-load of pool salt and some AquaChek White Salt Titrator strips. I've had the pool for 14 years, never had salt before, but when I used on eof the strips to see how much I would need to add, it tells me I already have 3680 ppm salt. How can this be?