Does the UV system add any chemicals to the pond water?
A. As note in the first question and answer, the Series 4 UV system treats the pond water only as it passes through the reactor chamber of the system. When bacterial and organic materials, such as fish waste, algae, bird droppings, dust etc. enter the pond and are circulated back to the reactor, the Series 4 UV system imparts nothing into the pond water when killing these bacteria and organic materials. This is a real plus over alternate sanitizing methods in that it is fully compatible with a fish or plant environment. In fact, the Koi industry has embraced UV sanitation as a necessary component of a properly designed pond.
