Picking a Pump for your UV Clarifier or Pressure Filter

There is nothing worse for a pond owner than seeing a water feature that has turned green. Green water is caused by microscopic algae floating throughout the pond. Even with proper filtration and regular use of the beneficial bacteria, some ponds are naturally more predisposed to algae blooms – especially if they get full sun or have a high fish population.

If you are constantly battling green or discolored water, then it may be time to add a UV clarifier. To make sure your UV clarifier performs properly, you will need the right pump. Here are some tips for sizing a pump to your unit.

Knowing Which One is Right

When sizing a pump for a UV clarifier, you want the flow rate to be just right. A UV clarifier works by destroying the algae that pass though the unit. Water moving too fast means that the cell wall is not exposed to the UV light long enough to do damage. Move the water too slow and it becomes a sterilizer, killing everything – including your beneficial bacteria.

Each manufacturer has different recommendations for their unit, so the best bet is to choose a pump that is close to, but not greater than, the maximum flow rate. Keep in mind, if you have a large pump to power a waterfall or other feature, you may need a separate pump for your UV Clarifier.