I saw this device that cleans pool cartridge filters (of course I am referring to the Blaster 1000 www.neotronics.com or other models). Has anyone owned one or seen one operate in person. They offer a video of it cleaning on their website. Does it clean as well as they show? It would be really nice to have one if it does work. My thoughts of it would be that the Blaster might just blast the dirt to the center of the filter.