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	μWs/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