What is the difference between a UV steriliser and a UV clarifier?

    The very simple answer to this is gapping. Sterilisers have a chamber that brings water and the organisms within it into very close contact with the lamp – this gives a much higher dose of ultra-violet radiation capable of killing parasites that would survive the lower doses used to kill algae cells in a clarifier.

    Because of this difference in exposure, a steriliser will effectively function as a clarifier but may be more susceptible to fouling when large particles of waste are pumped through the unit. This is less of an issue for a clarifier that has a larger contact chamber and less restriction on solids passing through it. This is why most units designed for pond use are clarifiers and better able to cope with a dirtier environment.

    Back to FAQ's

    For delivery before Christmas, orders must be placed on or before 3pm on Wednesday 20th December. We cannot guarantee delivery of these orders pre-Christmas as we are reliant on our couriers, but will use our best endeavours to get orders placed on this date out to you before Christmas. For full details of our festive delivery and opening times click here

    Please note: online orders placed after 3pm on Friday 22nd December will not be dispatched until the New Year. For full details of our festive delivery and opening times click here