Everyday I get about 20 dead spiders in the bottom of my pool. It's become part of my routine to jump in with goggles and skimmer (without pole) and clean them off the bottom of the pool. Kinda fun I guess, but if I didn't do this I would have to vacuum everyday to keep the pool bottom clean. Seems like they would float and be sucked in the skimmer, or get sucked into the drain, but they don't. They just pile up on the bottom in the deep end.