Last night I started trying out running my closed loop with the apex. Looked up the tides for Galveston just to get times to try. At 0% the pump runs at its lowest speed and 100% is the highest speed. Without shutting off the power, the apex can't turn the pump off, only change the speed, if that makes sense. So at low tide I have it at 0% and high tide at 100%.
Low 0600
High 1000
Low 1630
High 2330
And it ramps up and down to each of those points. So far it's working, which makes me so happy. This is one of the last things I've always wanted to do finally falling into place with this build.