I'm interested, but I'm not clear how I'd use these for saltwater mixing. Do you?
My plan would be put them on the side of my house. One for RO. One for salt. One I would try and run my gutter downspout to so that it stops draining against my house....
I just yesterday crawled into my crawl space with my kids and ran a RO line to the side of the house next to my peninsula. I'm hoping to move stuff out there so that I can stop rusting everything in my garage and also start de-reef-tank-crap-ing my garage.