In order for your pond to maintain water of a high quality, it is essential to ensure that a biological filtration system is used. Ultra Zap manufactures 4 sizes of Low Pressure Biological filters.

Biological Filtration is one of the most essential components of an efficient re-circulating system in a koi pond and are required to remove Ammonia, Nitrite and Nitrate.

Millions of colonies of Aerobic (oxygen loving) bacteria grow in our Bio filters, and thus it is essential that the pump providing water to the bio filter is continuously running 24 hours a day.

Max. operating pressure is one bar. Unit must be installed after mechanical filter.
i.e. sand filter or disc filter. Do not restrict outlet or reduce pipe diameter smaller
than 50mm. Install ball valve on inlet to control flow rate and water pressure.
NB: Not on outlet. Use media with low resistance on water flow. T. off after
mechanical filter and only pump portion of water through unit, depending on the flow rate of pump.

Bio Spheres – Balls

Bio Balls provide an excellent surface area for bacteria colonies
to grow on. Millions of naturally occurring bacteria, which live
on the surface break down the toxic waste, produced by the
fish and uneaten food. Bio Balls can be used in low pressure,
gravity feed and trickle filters, depending on the instillation
design. It is important to provide adequate mechanical filtration
before your biological filters and to clean the mechanical filter
regularly.

Bio balls can be used as an excellent biological filter for marine and freshwater aquariums as well as other outdoor ponds and breeding farms. There is an average of 13400 Bio balls per cubic metre. Surface area is approximately 340m² /m³. You will need approx 2 litres of Bio Balls per 1kg of fish. A 30 cm fish weighs ± 500 grams. Stock approx. four 30cm fish per 1000 litre. These are approximate figures and all other parameters should be taken into consideration.

It is important to remember that biological filters can take up six to eight weeks to establish, they also need a continuous supply of oxygen rich water and so must operate 24 hours per day. It is important to monitor ammonia and nitrite levels at regular intervals to make sure the biological filters are adequate.