QUALITY WATER EXPERT

An example of a pond in the second column would be a well-stocked koi pond, with few plants. In general, koi ponds will require uv units two to four times larger than well planted fish ponds. To keep such ponds algae-free, even on the hottest of days, a unit is required that is graded as a sterilizer. A unit specified as a sterilizer also comes with recommendations for the right pump to combine it with... Most of the charts that help you choose the right model uv filter, are based on the models themselves. I'll go the other way and start with the kind of pond you have as well as your specific situation, and then help you choose a model from there... The following chart will help you to find out which size UV light to choose. While this chart isn't very exact, the main goals are to point out how the size of the UV light changes in relation to the amount of sunlight, fish and plants in the pond, and to roughly determine whether you need a ‘clarifier' or a ‘sterilizer'.