I took Fig's advice and went with the Litermeter III for my ATO. I put a 44 gallon Brute about 25 feet away from my RODI. The Brute is right below my tank, and I'm pumping up to the sump upstairs. It's really a slick system. I think I might still need some sort of float to turn off the pump if my evaporation rate is less than expected, but right now I've got it dialed in pretty close.
I took a hundred water jugs to the recycling bin yesterday!
I took a hundred water jugs to the recycling bin yesterday!