I have a funny story to quickly relay - was talking to a customer about ponds (we may hire her husband, an electrician, to do wiring), and she told me of some freinds who just bought a home that had a pond - professionally installed. It was drained when they moved in. They filled it up this spring and discovered that whoever did the wiring did not have it grounded. Whenever you touched the water - Zap! Until he got it fixed he was getting freinds, while drinking beer in the backyard, to pee in the pond. Yow!<p>Be sure your ponds are wired by professionals!