Omg! I almost just died when I just went out to give the sock a final squeeze for the night. I did not turn on all the outside lighting, just enough to see the sock and squeeze it. While my arm was in the water, I suddenly felt an increase in pressure on my arm from what I thought was the water from the jet. I look at my arm and a snake was slithering around it! I almost had a heart attack! Too dark to see exactly what kind, and I wasn't about to investigate in the low lighting. My pool brush was right there, so I grabbed it and scooped up the snake and winged it into the bushes. You guys didn't tell me adding CYA was so dangerous!Nothing wrong. Feel free to squeeze all you want.