Might work ok. Might be worth getting two.
Over at this site you can get 50-60 CFM Computer fans. All you have to do is wire a 12vDC wall wart to it. The Brother's Grunt has a how to in the DIY section
Hey Buddy,
That fan you chose will work just fine. I have several Fish tanks with coral and live rocks and all of my gear is the same for hydoponics and aquaria. I use the same MH set ups as well as the same cooling i.e. fan, chiller, etc.
So, the one you chose on amazon will work perfectly for you either in line or by itself.