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UV Clarifiers and Ultraviolet Sterilizers



The UV Systems used in most ponds are clarifiers, they work by passing pond water close to an ultraviolet lamp that breaks down pond algae cells. Ultraviolet sterilizers are extremely effective when used correctly and are the most popular form of long-term pond algae preventative and pond maintenance. Water passing through the UV Clarifier unit should be as clean as possible and will ideally have been passed through a koi pond filter first. Prefiltering the water before subjecting it to UV Clarifier light achieves two things. First, the pond algae is less likely to be obscured from the UV Clarifier light by clumps of particulate and plant matter. The 'kill rate' will therefore be far higher than if the UV Clarifier has to penetrate less clear water. Secondly, non-filtered water may cause the UV to clog and will greatly increase the time you have to spend on pond cleaning and Koi pond maintenance.

Another benefit of having a Ultraviolet light is, it is a useful technique for controlling the free-swimming stages of a number of important microbial fish pathogens. In terms of its wavelength, ultraviolet (UV) falls somewhere between visible light and x-rays. UV rays generally kill microorganisms by attacking their cellular contents.

Ultraviolet clarifiers eliminate green water!


Pondmaster Ultraviolet Clarifier









The Pondmaster Ultraviolet Clarifier/Sterilizer is the only submersible unit on the market.

Pondmaster UV Clarifiers 10 watt, 20 watt, and 40 watt.


10 Watt Pondmaster Clarifier

Clarifier for ponds up to 1,500 gallons


20 Watt Pondmaster Clarifier

Clarifier for ponds up to 3,000 gallons


40 Watt Pondmaster Clarifier

Clarifier for ponds up to 6000 gallons.




Aqua Ultraviolet UV Sterilizers





Click Here for the Aqua Ultraviolet Unit sizes range from 8 to 160 Watt.




Use the following table to determine what size UV is needed for your pond if you follow wattage amounts:

Minimum Gallons Maximum Gallons Wattage
0 400 8-Watt
400 800 15-Watt
800 1500 25-Watt
1500 2500 40-Watt
2500 4000 65-Watt
4000 5000 80-Watt
5000 7000 120-Watt



Exposures Needed to Kill 99.999% of Microorganisms

Microorganism ╬╝Ws/cm2
Aspergillus niger (mold) 330,000
Bacillus subtilis (spores) 22,000
Chlorella vulgaris (algae) 22,000
Clostridium tetani 23,100
Dysentery bacilli 4,200
E. coli (coliforms) 6,600
Fungi 45,000
Icthyophthirius sp. (ich), tomite 336,000
Influenza (virus) 6,800
Mycobacterium tuberculosis 10,000
Nematode eggs 92,000
Paramecium (protozoa) 200,000
Penicillium digitatum (mold) 88,000
Pseudomonas aerugenosa 10,500
Saccharomyces sp. (yeast) 17,600
Salmonella sp. 15,200
Salmonella typhimurium (ave) 15,200
Saprolegnia sp. (egg fungus), zoospore 35,000
Sarcina lutea 26,400
Shigella paradysenteriae 3,400
Staphylococcus aureus 6,600
Streptococcus lactis 8,800
Tobacco mosaic (virus) 440,000
Trichodina nigra 159,000
Trichodina sp. 35,000
Yeast cells (brewer's) 6,600






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