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sera Pond Siporax Original

Biological high performance filter medium



  • self-cleaning, biological high performance filter medium
  • provides ideal settling area for useful filter bacteria
  • optimizes biological filter performance due to open-pored tunnel structures
  • increases the cleaning performance and the operating time of the filter
  • efficient pollutant removal for healthy, clear water


The decomposition of fish waste and organic matter in the pond ecosystem is of great importance. Fish and Koi ponds are a particular focus in this context, as, in some cases, high fish stock density may lead to heavy water pollution.

In the so-called nitrogen cycle, the toxic substances ammonia and nitrite are metabolized into the harmless plant nutrient nitrate by purification bacteria. A sufficient settling area for purification bacteria is required for an efficient nitrogen cycle.

Pond Siporax Original is a high performance filter medium with an ideally structured surface for the settling of (de)nitrifying filter bacteria. The special open-pored and three-dimensional tunnel structure provides a much larger settling area for the same filter volume compared to other standard filter media. The interconnected pores made of recycled sintered glass ensure ideal water circulation within the filter medium. This kind of biological self-cleaning considerably improves the operation time of the filter until the next cleaning.


Optimal pond care for a healthy ecosystem

The garden pond is a sensitive biological ecosystem that is exposed to a wide variety of factors. Natural water evaporation, rain showers, but also significant temperature variations have an enormous influence on the biological equilibrium. The well-being of the animals in the pond, such as goldfish, Koi and native species, e.g. bitterlings and rudd, also depends on these factors. To stabilize the pond ecosystem, it is important to know the water parameters. Particularly in Koi ponds with high fish stock density, the pH value, carbonate hardness, total hardness, nitrite, nitrate and phosphate should be checked regularly using water tests (drop tests or strip tests). With the water conditioners, care products and filter media from sera, you can create an ideal basis and react quickly and easily in severe cases.
Product name Content Item no.

sera Pond Siporax Original

10 L (2 kg) 08478
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