"Oxymel of Squill" wrote in message
news:GkF0c.1436$vY.486@newsfe1-win...
Anyone kno anything about uv lamps in filters. The advice is always to
replace them each year, but mine is chrotling merrily through its third
year
and the pond is perfectly clear.

Do uv lamps deteriorate slowly or just stop? Is there any reason to
replace
them beyond giving profit to lamp makers?

cheers

Jon



I go by the old adage "if it ain't broke, don't fix it".