Nope, 30 ppm shocking won't kill them...I finally just learned to live with them. The only way I've successfully been able to quickly clear my pool is to leave a couple of floating pool toys in the pool at night, and the spiders (and flying ants, and June bugs, and all the other wildlife that swims in my pool at night) climb up on them. I scoop them out with the net, drop them on the grass, and spray them down with bug spray. Works fairly well, if you don't mind bug spray in your yard. Beats swimming with the spiders!!

Janet