Pond - Filtration

I started of my mechanical filtration with two sand filters filled with Koi sand. These however needed to be turned and backwashed weekly, resulting in a loss of approximately 5000l of water at a time. I then purchased two Bubble bead filters to replace the sand filters. I only used them for three months now but hey already proved to be much more efficient than sand filters in that in a single flush of both filters, all debris and rubbish are removed and a maximum of 400 litres of water is wasted. So you use less water for the backwash and you need not open the filter to agitate the media. You don't even have to get your hands wet which is even better. A standard sand filter can also be converted to a Bubble bead filter, but since this solution is so cheap (I purchased mine for R5500,00 each at Loolilooks in Boksburg) and never looked back.

I then continued to use one of my removed sand filters, filled it up with Caldness and now have a huge Bio filter which feeds of one of the mechanical Bubble bead filters. The second Bubble bead filter's outlet feeds two 25l Ultrazap filters filled with loolitubes. From there it continues to a T-piece where one returns to the pond via a waterfall. The second passes in the pump house through a Venturi which in turn returns to the pond through two jet inlets. This creates a current in the pond ensuring a proper circulation, as well as adding vital oxygen to the pond.