In my basement i have a rodi which is connected to a 20 gal brute container, theres a float switch that fills up the bucket whenever i take out water ( i use this for my 75), ill mist likely just fill up a couple 1 gallon jugs and store them in my closet, ill mark the side of the tank in 2 spots , desired level and level to top off, i could buy a ato but have no spot to put it. As for the build, i should have the tank up in 1-2 months, ill keep everyone updated.