Laura, very pretty pond! Too bad you live so far away, as I just filled my first ever pond 2 weeks ago, and planning to add my first "test" fish this coming weekend! I had green water (actually allowed it to go that way on purpose, since water was straight from well) and now it is clearing up, although not clear enough to see to the bottom (4'), so was also thinking about a UV light. Thanks for your post. I also learned from it.
Good luck in relocating your fish. Try an ad on CraigsList in your area, might get them sold and have the money to purchase a new UV light.
Fishin, care to share which light bulb is the cheapest to replace? I would love to know this info as well. I'm like Laura, I read and get confused, sometimes it's so much easier to get the "real" info from others "in the know". Thanks!