Finally got around to opening up the DE filter to get it cleaned out (I think the prior owners never cleaned it) and low and behold 5 of the 8 grids are broken. I know I need to replace them, the question I have is what is the impact of putting bum grids back in? I don't have the patience to deal with Leslies and am going to order them ... sometime in the next month ... from poolsupplyworld.