How Do I Eliminate The Dreaded Green Water
 From My Pond?

With the addition of a UV1 Ultra Violet Light to your system, where water under pressure from the pump will be exposed to UV radiation, harmful bacteria is reduced.  At the same time, the algae will also be eliminated.  The best UV lights are designed so that the UV bulb is located inside a quartz sleeve (a long thing glass tube).  This allows the UV to operate both dry and hot.  Efficiency is greatly increased when the bulb is not being cooled due to its coming in contact with the much cooler pond water.  There are many variables in choosing a particular size UV such as stocking density, water plant quantities, sun shade, etc.