all the PH's that i have or bought have an attachment that holds the airline in the middle of the inlet...what kind of skimmer do you have? on your PH does it have the basket built into it already....so nothing gets sucked into the impellar. if it does melt, drill, glue, ect. a hole or an airline adapter to it on the intake side and it will suck air into the impellar. but far warning some PH's arent made for this and it might not work so youll have to get a pump or PH that will. hope this helps