I use the BigNG to control MCP355 pumps.. just set the voltage corresponding to the water temp (i.e. 8V at 30C water, 9V at 33C and so on) and it'll scale your pump automatically according to your water temps. Theoretically the poweradjust should be abl to do the same.
However, you'll need to solder the wires of the pump to a 3pin fan connector first.