After years of research Hozelock announce their new filter.Quote REV in shopping basket for free delivery.Creative thinking has led to a removal of solid filter sponges to be replaced by a quantity of smaller cubed spon filters.The clever thing about this approach can be seen when it comes time to clean the filter all you need to do is switch off your pond pump and give the cleaning handle a few turns each way.Inside your filter the micro sponges are displaced and bang into each other effectively dilodging dirt.Switch your pump back on with the water now directed outside of your pond to the waste outlet and watch in amazement as your dirty water disperses.Definitely a contender for pond productv of the year!!