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.
Personally, I would recommend that you go with the Laguna Powerclear Max UV Clarifier, which is the one at the bottom of this page. All of them are good, however I've had very good results that type of ultra violet pond filter.

Click Here For The Gamma Pond UV Light

Click Here For The GreenFree UV Clarifier

Click Here For The Pondlife Turbo Twist Pond UV Clarifier
