"Coffee" wrote in message
...
Do these really work? Won't they harm the beneficial bacteria needed in
the
filter?
Patty

Some say yes, some say no, some say yes but why use one? UV clarification is
a religious topic not nearly as fundamental as "to salt or not to salt" but
it's up there on the top 10. Many ponders believe that a proper balance in
your pond negates the need for a UV clarifier. Those that prefer UV
clarifiers swear by them. There is really no right or wrong answer. Some
people like mechanical bio-filters, other like vegetable filters. Neither is
right nor wrong.

As for your beneficial bacteria...certainly bacteria flowing through the UV
could be and probably would be harmed, but the bulk of your filtration
bacteria is sedintary. They like to sit down on a rock and watch the pond go
by, snatching their meals as they float by. So unless you are moving your
ponds walls, rocks, etc, thru the UV, you have nothing to worry about.

BV.

Disclaimer: I am a VF user...and do not use nor intend to ever use a UV
clarifier. Natural ponding, baby, natural ponding.