In your above post you recommend the Haywood ARQ15. The link take me to the page on Amazon which has 2 versions of the system. They show ARQ15 and the W3ARQ15. I have searched and searched and cannot find out what the difference is. However the W3ARQ15 is almost twice the cost of the ARQ15. Do you happen to know the difference? I am looking to purchase a salt system, so any help you can give will be appreciated.

DerrikM