hoax seeing how you have a PA series lemme recomend some additional stuff to help ya out.

1. http://www.jab-tech.com/120mm-Plasti...r-pr-2470.html

However you need to replace that crap internal filter as it sucks. To something a little thicker like this:
http://www.hectorshardware.biz/shop/...07&sku=437417&

The reason why i love that filter is because its SUPER easy to remove and clean and reinstall. And its VERY PA friendly.