In my never-ending quest to get my filter repaired and pool opened I'm about ready to just go buy a new filter/pump combo. The guy at the pool store said I needed a 400 lb sand filter (?). I thought that was a bit extreme as the one the previous owner left us is 200 lbs but that doesn't necessarily mean anything either. Are there some guidelines on this board to recommend a filter size based on pool gallons (we're approx 14,000)? I know pump throughput has a lot to do with it too.