Here's where they got us CheapSkates. Making your own device like a scwd or other device using a motor to switch flow direction are either so bulky or to expensive. Keeping it from leaking and obtaining salt safe valves and fittings is what's difficult. An Ocean'sMotion unit is nothing more than a couple machined pieces of ABS plastic a couple of O rings and a small motor! Of course You can throw down a couple of bills on a fancy controller,then cough up the rest of your credit limit on the PH's required.
It just ain't right!
