If you want to control this pump via PWM you would have to modify it since it does not comply with Intels PWM standard. You can find
a guide here.
Just in case you do the modification you can take the power directly from the PSU and only connect the rpm and PWM line to one of the four fan ports of the aquaero. In the fan tab you have to switch the control mode to PWM.
If you do not want to modify the pump you can only control it by its voltage. In this case you will need
this adapter if the pump uses a 4-pin plug for the power and another 3-pin plug for rpm/PWM.