I've done it! I feel so guilty, but I know it was for the best. I put some freezing cold water from my pond in a container nad made it even colder by putting it in the freezer for a bit. Then I netted the half dead SweetPea and tossed her in. Actually, she got stuck in the net, so it wasn't as swift as I had hoped. I almost broke down in tears when I saw her little fins wiggling. I'm pretty sure it took longertahn a few seconds...but I didn't have time to count as I immediatly put a towel over the container and stuck it in the freezer. How long should I wait? And how should I get rid of the body?