We're about a month away from getting our new pool installed. We're getting a Radiant Metric 18' x' 34' oval, w/52" sidewalls, 6.5' deep end, partially buried. If my math is right, I think that's about 19500 gallons. I'm going with a cartridge filter system, as well. Having read through your forum for the last couple weeks, it seems that dealers don't always sell you the correct equipment for your pool's needs. Either because they don't know any better or they think we won't know any better. Well, that got me wondering what pump and cartridge I was actually buying, so I called to ask. When I asked what the flow-rate of the pump was, their response was "it's a 2hp pump". I then asked what's the GPM rating on the pump. They did not know and would have to look into that and get back to me. They did call back later and said it's rated at 75gpm. I asked what the sq ft area of the cartridge was, they said 300sq ft, but that seems high, so not sure if that's correct. Bottom line is, I'd like to make sure whatever pump/cartridge combo we get is right-sized for our needs. Any input would be greatly appreciated!