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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

Turbo-Twist UV Sterilizer 3x 9watt CL8558
Features a quartz glass sleeve surrounded by a revolutionary "Turbo-Twist" flow design to increase dwell time, which in turn increases efficiency. Triple-treatment time fully utilizes all the available UV output of the lamp-outperforms larger units. Treats up to 125 gallon saltwater or freshwater tanks, . Hang-on-tank bracket included or locate anywhere in your system. 9watt Philips PL compact fluorescent UV lamp included. Eliminates single-cell algae for crystal-clear aquariums. Eradicates most harmful microorganisms on the initial pass through the chamber.

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