Wigan-based manufacturer Evolution Aqua continue to plough their own filtration furrow with the release of their latest pond filter – the Tempest.
Named after a violent windy storm, Tempest is a pressurised pond filter for ponds up to 5000 litres/1100 UK gallons which offers both mechanical and biological filtration by way of one built-in plastic media. Dirty water is pumped into the bottom of the cylindrical tube filter where it rises up through the floating media at the top. Particles are trapped as they pass through and beneficial bacteria convert liquid waste into less harmful substances.
The storm part however is how you clean the filter. Turn the pump off, shut some valves and open a waste valve, and air is sucked into the chamber, violently tumbling the media and sending waste out while air is coming in. Shut the waste, open the valves and turn the pump back on and normal filtration is restored by the newly cleaned media. Dirt can be flushed to a bucket, down a drainpipe or just onto your lawn.
The cleaning method is different enough to have a patent pending and unlike nearly all other pond filters, you won’t have to replace the media like you would a sponge. What’s more, the media is EA’s new K+Media, an evolution based on K1, meaning you get all the little extras like protected surface area and other beneficial lifeforms eventually dwelling in amongst it too.
It is only rated for ponds of just over 1000 gallons although it has also been purposed to be the final, inline filtration stage on any other filter (including large koi filters,) and if you want a battery of them on your pond fill your boots because you can do that too. They’re only £249.95 RRP.