the only way i can see in which the aquaero could control the pump is by connecting it to one of the fan connectors
but this wouldn't be recommendable, the pump could easily burn out that output (it needs much more power than a fan...)
all you can do at the moment is to connect the tachometer wire (and ONLY this one) to the ae so you can at least display the speed it's running at
btw:
if you don't need the power of the laing pump (which i really doubt) the aquastream might be the better choice, the laing is a bit louder...