Safety Instructions
Never submerge the unit in water! The external electrical cable of this apparatus cannot be replaced. If the cable is damaged, the apparatus must be destroyed. Remember that UVC radiation is dangerous to the eyes and skin. Always switch off the unit if there is no water running through it to prevent overheating. Do not look directly into unshielded bulb as damage to the eyes may occur. Check the UVC lamp after the unit is assembled through the transparent screw cap. The power supply must be switched off immediately if the apparatus or the electrical cord should become damaged. The US National Electrical Code and many local codes require that a Ground Fault Circuit Interrupter (GFCI) be installed in a branch circuit supplying fountain equipment rated above 15 volts AC.

Maintenance
In order to keep the UVC apparatus working properly, you must clean the intake and discharge connections and the quartz sleeve 2 to 3 times a year. To do this, you must first switch off the power supply to the UVC apparatus and to the pump unit. Carefully remove the quartz sleeve from the bulb and cap cord assembly. Wash the quartz sleeve with lukewarm soapy water and rinse thoroughly. Remove any lime scale with vinegar and rinse thoroughly (it is important that you do not touch the UV Light Bulb; the small amount of oil that is naturally on your skin will ruin the bulb. If you touch the bulb, clean it with rubbing alcohol before resuming service). The effective service life of the UVC lamp is 6,000 burning hours. If used continuously, the UVC lamps will last the entire pond season. It is recommended that you replace the UV bulb every spring.

Additional Maintenance Tips
When carrying out any maintenance, the unit must be unplugged from the electrical outlet. Always remove the intake and discharge hoses and drain the water before cleaning. When algae densities are high in your pond, the unit should be cleaned regularly every 3 to 5 days until the problem is under control. When reassembling, make sure the O-rings are properly seated on the quartz sleeve. A small amount of petroleum jelly can be used for lubrication, if necessary. The UVC bulb should be replaced every season to guarantee efficient operation. During the winter season when temperatures fall below 50 degrees Fahrenheit, remove the UVC apparatus to prevent it from freezing.

Applications

• The 9 Watt UVC unit is suitable to treat ponds up to 2,000 gallons. The maximum recommended flow rate for this unit is 500 gph.
• The 18 Watt UVC unit is suitable to treat ponds up to 4,000 gallons. The maximum recommended flow rate for this unit is 1,000 gph.
• The 36 Watt UVC unit is suitable to treat ponds up to 8,000 gallons. The maximum recommended flow rate for this unit is 2,000 gph.

Use
UVC equipment has been used for some time to keep aquarium and pond water free of floating algae and to reduce water borne pathogens. UVC filtration can also ensure crystal clear water and a healthy aquatic environment for both fish and aquatic plants. The effect is based on the use of ultraviolet radiation, which affects the cells of both plants and animals. The effect is optimized by the fact that water to be filtered is led directly along the UVC tube in a thin film. The UV radiation will kill the algae but a pond filter is necessary to remove the clumps of dead algae. UV clarifier will not kill string algae. How efficiently a clarifier works depends entirely on the conditions of your pond (i.e., the number of plants and fish, and the amount of sun exposure). For most ponds with normal levels of green water, the cleaning process can take anywhere from 1 to3 weeks. It is recommended that you have the UVC unit on throughout the pond season. During the winter season when temperatures fall below 50 degrees Fahrenheit (December to mid March), the UVC unit should be removed to prevent it from freezing.

Putting the UVC unit in use
In order to ensure that maintenance and cleaning of the UVC unit is kept to a minimum, it is recommended to use a filter with your pond pump. Always install the UVC apparatus outside the pond. Make sure that it cannot become immersed in water (it is important that you do not touch the UVC light bulb; the small amount of oil that is naturally on your skin will ruin the bulb. If you touch the bulb, clean it with rubbing alcohol before resuming service).