Ok the green is the input and the red is the output and the blue dots on the green pipe where they 90 at is a valve to controll input to each tank.Feel free to pick it a part then I will start on the sump it self
It looks like this is a pretty good design. The only thing you should look at is how much head loss you will have with all of the outlets. You won't have a whole lot of pressure at the outputs of the tank.
Just going to put valve between pump and tank to control flow.To make it more of a equal flow of water to all 6 tanks.I may have my inputs and out put back ass words hehehe