Dosing pump for Water changes?

I was thinking of using a dosing pump to do daily water changes, any ideas on that? i was looking at the Jebao Dosing pump DP-4 (it is the cheapest out there) and was wondering if there is a way to change the flow per minute on each of the heads? Any ideas? The dosing pump can be used to dispense from 1ml-9999ml per day. But does anyone know if you can change the flow per minute?

:)



Thanks