GHL Maxi for Auto Water Changes?

[ReefLab]

it is on a schedule. i use 2 20 gallon brute can's one for mixing one for storage. when one goes empty they water is moved to the "holding tank" i do roughly 2 gallons a day on a 120gal system. i do not heat or circulate the water in the holding tank. i havnt played with the manual dose buttons on the front of my unit. mine only run the head when pressed. so many ways to skin this cat. i chose the best/easiest way for me at the time to get it going, while still learning the ghl platform.

Yeah it doesn’t seem like I’m trying to do something revolutionary so there should be a way.. I don’t actually have the pump yet but iM just trying to make sure I get something that fits my needs