The outlets are adjustable and they include a flow deflector. The pumps are designed with outlets of 1" diameter to minimize the shearing force that kills plankton. They are fully computerized and the delivery includes a pump, computer, transformer. They run on low voltage AC- the 7310 uses 17V. The pump uses only 22w. Because of the computers and unique pump design the flow can be varied between 180gph and 792gph. This pump can also pulse so that every few seconds it speeds up and slows down to simulate waves.