I want to install a UV sterilizer in my pond, but would prefer to construct it myself, partly because I'm a retreaded engineer, and partly because I'm sure I can do it for considerably less than the cost of retail units. Does anyone know of a web site or newsgroup that covers construction details, experiences, war stories, etc. on the topic?

As a side note, does anyone moderate this discussion group? It sure contains a lot of spam...

- John