So I have been doing water changes manually by activating my PMUP in the sump to drain and then the PMUP in the fresh SW bucket to refill the sump. I would like to automate this and don't know exactly how. In my sump, I have an ATK as well as an extra optic sensor. I am hoping to program the AWC to activate on Monday, Wednesday and Friday at 11AM. As it starts to drain using the PMUP in my sump, as soon as the low optic sensor (just above the return pump) is "open", it shuts down the PMUP. Then it starts the PMUP in the SW reservoir and begins to fill up the sump until the water line hits the first ATK optic sensor. Will this work?