Since I got Zodiac Mars HP pressure side cleaner I have not had to vacuum my pool, I only have to brush the top step and the swimledge since the cleaner can't get to them, and my filter is staying much cleaner since the crud in the pool is being picked up by the Mars! It's cut down on pool maintenence a lot and I can enjoy what little time I have IN the water instead of cleaning the pool! Now if they would just develop a pool cleaner that can empty it's own dirt collection bin I would be set! (I do have to empty the cleaner weekly. I am amzed at how much stuff it picks up. When I was manually vacuuming I only did it about every 3 weeks because that's how long it took for the pool to look dirty. When I see how much stuff the Mars picks up in a weeks time I am amazed!)