Ultra Violet Pond Filter
http://www.ezinearticles.com/?Ultra-Violet-Pond-Filter&id=36683
Having an ultra violet pond filter will give you a much better
chance at keeping your pond water clear. When used in conjunction
with your regular pond filter, it’s more than likely that
you will have nice clear pond water.
The way it works is this. As water in your pond passes through
the ultra violet pond filter, the UV light inside of the tube kills
the algae. As the algae dies, it begins to clump together. Now your
regular pond filter goes into action and traps these dead algae.
Without one of these ultra violet pond filters it will be difficult
to keep your water clear, and on sunny warm days you will get algae
blooms like you wouldn’t believe, which in turn will make
your water pea soup green.
You can get a couple different kinds. They make a submersible kind
and an external one. Personally, I think it’s better to have
a submersible UV light, just for the simple reason that they’re
out of sight. They are durable and should last you for years, although
you may have to replace the light bulb after so many hours of use.
In a nutshell, you really don’t want to be without an ultra
violet pond filter.