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6. UV Sterilizers and Green Water

Nothing spoils the appearance and enjoyment of a garden pond quicker than green, murky-looking water. Installing a UV sterilizer is the only guaranteed method for the complete elimination of the green water caused by millions of unicellular, waterborne algae. Algae spores are persistent in the air, fall into the pond where they proliferate by rapid cell division. Nutrients from fish waste, decaying plant matter and other organics inevitably present in ponds keep these colonies flourishing and promote the frequent appearance of algal blooms.

UV sterilizers generate ultraviolet radiation of sufficient energy to quickly and effectively kill microorganisms such as algae exposed to this UV radiation. With continuous operation of a properly sized UV sterilizer, your pond remains sparkling clear without harming fish or plant life. This is the kind of killing power you need to eliminate algae spores and keep your pond free of dangerous microorganisms that are harmful to your fish. The units are designed for outdoor use but should be protected from direct effects of weather such as rain or freezing. This is a valuable addition for the serious Koi keeper. Most UV sterilizers can be installed in-line either before or after the biofilter once the pond has completed the Nitrogen Cycle. Completion of the nitrogen cycle takes from five to 12 weeks. Once toxic levels of ammonia and nitrite have fallen to zero and healthy colonies of beneficial bacteria are established in the pond a UV sterilizer can be installed.

Danner Submersible Ultraviolet Lighting
• completely submersible ultraviolet Clarifier/Sterilizers
• can also be placed outside the pond
• blue halo light confirms operation
• unique vortex flow design increases water contact time
• includes 9000hr lamp, quartz watertight sleeve, transformer, 18’ grounded power cord, and barbed intake and outlet
• great value along with ease of use

Laguna Powerclear Max UV Sterilizer
Models in 8W, 25W and 55W
• Guaranteed to eliminate green water
• Helps to create beneficial water conditions for fish and plants
High output units feature unique UV spiral chamber which provides extended UV exposure to water and increases efficiency by 50%
Quickly and easily installs in-line on a pond system thanks to two Universal Click-Fit connectors that allow connections to 3/4", 1", or 1-1/4" hosing
Can be mounted horizontally or vertically using mounting brackets provided
Flow rate: up to 1300gph
For ponds 2000 - 5000 gallons

Laguna Powerclear Max 1000 8w UV Sterilizer
Laguna Powerclear Max 2000 25w UV Sterilizer
Laguna Powerclear Max 5000 55w UV Sterilizer

See All UV Replacement Bulbs

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