Questions about the bleach dip procedure

I bought a couple of plants yesterday at my LFS and since I'd had snails with other plants I've purchased there, I decided to do the bleach dip procedure on these new plants. I made an approximate 5% bleach solution. (3 tablespoons bleach to 4 cups of water (64 tablespoons))

I dipped the new plants for 3 minutes, and then immediately into a warm water bath for about 10 minutes. I also rinsed them several times again since i was worried about residual bleach killing my fish.

Question #1: Am I doing the bleach dipping procedure correctly to kill snails?

Also, I dipped some italian vals that were growing algae on them in the bleach solution for about 2 minutes . I also rinsed these about 6 or 7 times in warm water.

Question: will the bleach kill the hair growing on these vals? The hair was still there when I put the vals back into the tank.

thanks for your expertise!

just a quick update on my plants. they turned out in horrible condition. the vals became a light green and started started not standing up straight. the water sprite also became very pale and the bottom of the plant started disintegrating.

I'm definitely not going to do any bleach dip, or if you do, just do a quick 5 second dip. I consider this a learning experience that didn't cost too much, but I tthink I'd rather deal with a few snails than kill plants intentionally.