Q: How often should I be changing my UV bulb?
Deborah – Providence Forge, VA
A: Your UV bulb is an important component of your pond’s filtration system. The bulb’s ultraviolet rays destroy the ultra-fine planktonic algae that cause green water by destroying the plant’s cellular walls. The tiny dead algae particles are then removed by your mechanical filtration system, leaving behind clean, clear water.
For maximum effectiveness, you should change your UV bulb at least once a year, such as when you perform your pond’s annual spring cleanout. If you’ve recently changed your bulb and your water is still turning pea soup green, you might need to simply clean off debris that has built up on the bulb itself.
Whether you have a standalone UV clarifier, like the PowerUV™ or one that’s part of a filtration system, like our ClearSolution™, use a soft cloth when cleaning or changing the bulb rather than using your bare hands. The oils on your skin can actually shorten the lifespan of your bulb.
Unfortunately, a UV clarifier does not affect string algae at all, so you’ll need to use AlgaeOff™ or AlgaeFix® to rid your pond of it. But if your pond turns green from planktonic algae every year from full sun exposure or too many fish, a UV clarifier is an excellent solution.
Preventing Algae Growth
Though UV bulbs do a great job with green water, an even better solution is to prevent algae growth in the first place. Planktonic algae flourishes in ponds that have nutrient-rich water—meaning water that has lots of fish waste, leftover fish food, decomposing plant material and even fertilizer from your lawn.
You can tamp that green growth down by reducing the number of fish in your pond, minimizing the amount of food you feed them and cleaning up the waste they produce, as well as regularly removing the built-up detritus.
Consider using the Pond Logic® DefensePAC®, which uses beneficial bacteria to improve water quality throughout your water column, eliminate muck and built-up debris, and enhance fish health. With quick and easy application, you’ll see noticeable results in no time.
Pond Talk: Besides using a UV bulb, what do you do to reduce or eliminate planktonic algae in your pond?
Filed under: Algae Control, Pea-Green Algae, Season-Long Control, Seasonal Care, UV Filter, Water Gardens & Features, Water Quality Issues Tagged: | bacteria, clear water, green water, green water algae, Pea-Green Algae, poweruv, Season-Long Control, uv, UV Clarifier, UV Filter, UV Filtration