After having the XP4 running on my 150 for the last 3 months, I have to recommend NOT buying this filter.
Out of the box, it was simple to load and get started (much the same way as the earlier models). It ran like a charm for a month. Then, one day, it quit. I opened the impeller cavity and found that the impeller and magnet would no longer match up (very bad 2-piece arrangement). I had to cut an old suction cup nib to keep the impeller seated to the magnet. A couple of weeks later, the filter quit again. This time the entire inside surface of the impeller was shaved down to where it could no longer engage the spinning magnet. I ordered another impeller assembly 3 weeks ago and am still waiting for it. I had to take the impeller from an XP3 I wasn't using just to keep a reduced flow running on the tank.
BTW, received a Fluval FX5 at the same time. It's been running without any problems since it's installation. I ordered 3 more.
Out of the box, it was simple to load and get started (much the same way as the earlier models). It ran like a charm for a month. Then, one day, it quit. I opened the impeller cavity and found that the impeller and magnet would no longer match up (very bad 2-piece arrangement). I had to cut an old suction cup nib to keep the impeller seated to the magnet. A couple of weeks later, the filter quit again. This time the entire inside surface of the impeller was shaved down to where it could no longer engage the spinning magnet. I ordered another impeller assembly 3 weeks ago and am still waiting for it. I had to take the impeller from an XP3 I wasn't using just to keep a reduced flow running on the tank.
BTW, received a Fluval FX5 at the same time. It's been running without any problems since it's installation. I ordered 3 more.
I've been running XP3s and XP2s for years w/out problems. The FX5 looks promising. It's HUGE!
