| Kathi, My first instinct is that an extension cord is not a good idea. No matter how well it would be "waterproofed" there is still a possiblity of it getting wet at some point. Link below has a bit of discussion regarding such. My solution to having a pond beyond an electrical connection and the cost of putting one in was going solar. It worked well and no concern about electrical. There are some downsides to solar, but still got my pond/waterfall/small creek. |
Here is a link that might be useful: Ponds
| I found a weatherproof housing for extension cords on the internet at Aquatic Eco-Systems. You do need to know the gauge of your cord to choose the proper size housing. |
Here is a link that might be useful: Aquatic Eco-Systems
