Yamitsu is probably one of the best known brands of Aquatic products and U.V's in the UK and have been around now for a great number of years.

The range is vast coping with ponds from just 200 gallons right up to 30,000 gallons - there is sure to be a model to suit your own particular application.
 
Yamitsu have been manufacturing Algae Masters in Great Britain since 1990. Their unique specification and design ensures a high efficiency unit at an affordable price. They are made from UV stabilised materials to ensure a longer life and incorporate turbulators to enhance the unit’s performance. Large inlet and exhaust ports make them suitable for a wide range of applications. Single tube units are available in 6, 8, 15, 30 and 55 watts.