1. Are Pond Systems Sized Differently From Other Applications?
2. Which Delta UV Series Is Best For Koi Pond Applications?
3. Do Koi Pond Installations Require Any Special Maintenance ?

Are Pond Systems Sized Differently From Other Applications?  Yes.  Due to the nature of ponds (depth, area, fish population count, available daily sunlight, etc), Koi pond applications require different sizing of the UV unit than other applications.  The flow rates are the same for all applications, but as a rule of thumb, larger units will be installed on Koi ponds than would be installed on the same capacity of swimming pool or water feature.  Each Installation and Owner Manual has a Pond sizing section to assist with proper sizing.  Your Koi Pond Dealer is also a good source for assistance in ensuring the proper unit sizing for your pond.  You can view and download all Installation and Owner Manuals (with pond sizing therein) by clicking on the DOCUMENTS button.

Which Delta UV Series Is Best For Koi Pond Applications?
While all Delta UV series are applicable for Koi Pond installations, the Elektra ProT EP series has become the "Cadillac" of the Koi industry over the past four years.  The EP Series is 100% stainless steel construction and carries the longest Limited Warranty (5 years) of all Delta UV units.  Originally designed specifically for Koi pond application, the EP units feature a low pressure switch that is compatible with bead filter installations, and a generous 2 inch (63 mm) inlet/outlet unions that provide ease of installation and removal for maintenance of the quartz tube (periodic cleaning).  If your installation is a salt water installation, then we recommend the all polymeric (plastic) E Series as the harsh environment of a salt water installation is better served when no metal is present to cause corrosion of the vessel.  When your pond has the EP series installed, you have selected the best UV unit for the Koi pond enthusiast .

Do Koi Pond Installations Require Any Special UV System Maintenance ?
Due to the increased nitrogen in the pond water caused by the fish population, the quartz tube is more susceptible to film build-up than in other installations.  Thus, it is recommended that to obtain optimal operation of the UV System, that the quartz tube inside the UV vessel be cleaned every four months instead of the recommended bi-annual cleaning recommended for other installations. Also, like all Delta UV Systems, the UV Lamp must be changed each year as the bulb life of 9000 hours is reached over that time period.  Both lamp changing and quartz tube cleaning instructions are clearly described in the Owner Manual for each unit, which can be viewed in the DOCUMENTS section of this website.  These two maintenance items require very little time to complete and do not require any special tools or equipment to accomplish.