I was just getting ready to pull the trigger on a 150 sqft WaterWay cartridge filter when I remembered someone on the forum mentioned craigslist and I thought I'd check it out before spending the money. The first result was a 450 sqft Hayward cartridge filter for $150 at a some warehouse. I couldn't get there fast enough. It's never been used and is clean as a whistle on the inside, but the outside will need some elbow grease. Can't believe my luck.
My next step is to get a pump to go with it. I am looking at Blue Wave 2 speed models, but am trying to decide between the 1 hp and 1.5 hp. I am leaning heavily towards the 1 hp, but the bump is only $15 more (due to taxes on the 1 hp).
On that note, has anyone had any experience with the Blue Wave brand? Good, bad?