You will also need a valve to slow down the output of your
pump.....

I think you only need that if you're getting an inline model. (Which he can't,
since he's got a power filter.) If you're getting a standalone, you just have
to be careful to buy a powerhead with an output that matches the UV
sterilizer's gph rating.

Leigh

http://www.fortunecity.com/lavender/halloween/881/