Coolwater i've heard bad stuff about that one... i rather buy a Seio or a Tunze i would like to get 2 Tunze for my future 330g (once my mom lets me get a job)
I have used that water deflector...it is ok, severely reduces the flow rate, I would recommend just getting the seios, I traded all my other small pumps in for 2 seios and it was the best thing I ever did.