well it depends on your sand too i guess if its really fine like mine you would have a problem with a gravel vacuum cuz it will just siphon all your sand out honestly i ditched the vacuum and just use the hose directly like a vacuum it worked better for me really isolating the spot i want to clean. the circular motion is for added suction it creates a lil vortex in the sand allowing you to penetrate it deeper
oh yeah and the deeper the sand the more offten you will have to stir mines only about an inch but my cichlids stir it up on a regular so once a year seems like enough to me
oh yeah and the deeper the sand the more offten you will have to stir mines only about an inch but my cichlids stir it up on a regular so once a year seems like enough to me