well, it's just about time for me to get 'er up & runnin' again. at the end of last pool season i had to shut 'er down a little early due to poor filtering. it was suggested here at that time i should check for "channeling" in my sand filter. i plan to try to do so this weekend. now, my memeory ain't what it used to be, so could you tell me again just how i should go about it? thanx again, oh gurus of the pool.