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The shape of a biofilter has no bearing on its operation.Make your own with Supra and saveBe aware that the shape of your pond filter has to bearing on its function or operation. You can save a lot of money by making your own biofilter, and a good filter will have a dramatic effect on your pond water quality and thus the health of your koi and other fish. Store bought biofilters can be expensive, and often retail stores will overcharge for these items, so making your own filter is a great option. In their simplest form, a pond filter or biofilter is just a black or green container that can be square, round, fat, thin, or almost any other shape and size you can think of. These filters usually hold brushes, sponges, or some other means of trapping solid particles and removing them from your pond water. A typical biofilter also contains plastic tubing called Flocor, plastic balls, lava rock, hair curlers, string bags and even Coke bottle tops. The best filters use Alfagrog, or Supra as it's known in the US. The collective name for these objects in a filter box are biomedia, (ie a medium or surface) on which biological activity can occur. In other words, the biomedia provides a place for the specific bacteria to grow, and in turn the bacteria converts the toxic waste products in the water to harmless nitrates. The sponges and brushes are present to remove the larger, solid wastes from the water. The best biofliters combine the action of ultra violet light (UV) with that of biofiltration. These combination filters will not only keep your pond water clean and healthy, but free of the green, pea soup appearance that pond water sometimes gets. For more information about biofilters and Supra, see this page. |
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