UV pond filters kill algae and bacteria, which means you need an additional filter to get it out of the water. Additionally, a pond UV light filter will not help to get rid of string algae, which does not travel in the water column and is therefore not exposed to the UV light.

How long does it take for a UV to clear a pond?

How long will it take to clear the pond? Once fully mature, you should notice a difference within one week of turning the U.V.C. on and full clarity should be achieved in two weeks.

When should you turn on UV in a pond?

If you have a pond with less than 50% shade and find yourself constantly fighting green water then we highly recommend adding UV. We also find that experienced pond owners appreciate using UV to not only keep water clear but to provide further sterilization on the quest for the healthiest water possible.

Does UV light keep pond clear?

Pond UV lights can be used to keep ponds clear of algae, but they aren’t the best tool out there. These lights only work on certain types of algae and they only clear the algae. You can find much better pond equipment than UV lights for keeping your pond clear and healthy, like the Ion-Gen.

Do I need a UV filter for my koi pond?

The remnants of the algae then clump together and are easily taken out by your filter. You can have a filter without a UV but don’t expect to have clear water. However you must not use a UV without a filter as the dead algae will have nowhere to go and will just rot in your pond creating more problems.

Does UV light stop algae?

By showering algae with ultraviolet rays, a UV sterilizer kills algae the same way it kills other microorganisms. Radiation prevents it from reproducing. Because algae contribute so much to the turbidity of your water, killing free-floating algae dramatically improves your tank’s clarity.

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