Evolution Aqua Evo 30w Pond UV Unit 30 Watt Water Clarifier Steriliser Green
The evo30 is suitable for ponds up to 30,000 litres, the evo55 is suitable for ponds up to 55,000 litres and the evo110 is suitable for ponds up to 75,000 litres. If in doubt, speak to your dealer for more advice.