I noticed there is now a cartridge filter system available for pools. I currently have an 8 year old standard sand filter, with original sand, and a new Pentair Superflow 1.1 HP pump purchased last year. The pool is only 2300 gallons. We like the strong flow of the water, but the sand filter is difficult for me to open and maintain. I thought the Doheny's Pool Pro Deluxe 200 sq. ft. Cartridge Filter only would be a cool replacement. The pool is basically an indoor pool, with two users, an hour a day, and there is simply not much to filter. With such a small pool back-washing is a problem, as you can easily loose an inch or two... So my question is, will the cartridge filter restrict the flow, equal to or less than the current sand filter? Are there any drawbacks, or negative aspects of a cartridge filter system that I'm not aware of? I would like to have equal or more flow with easier maintenance. Thanks