Worst filter purchase in years. And, that says alot considering I've bought dozens in the past couple of years. The impeller can't handle the torque of the stronger motor and the magnet to impeller joining cog shears away. I'm on my 2nd impeller and the filter has only been on the tank for 3 months. The XP3 is a good filter and my 3 have had no problems. The XP4 had little forethought in its engineering before going to market.
Looks like FX5s for future purchases.