SKU: 99691349191

Sera Siporax Professional - Biological Filtration

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Description

Sera Siporax Professional - Biological FiltrationSera Siporax Professional Biological Filtration Maximum optimization of biological filtration 1 Litre contains 270m2 of Bacteria growing surfaces! The original sera siporax Professional is suitable for use in both freshwater and marine aquariums as well as in ponds. Not depending on the kind of filter (internal external trickle filter), it maximizes the surface required for biological purification and provides the optimal substrate for the settling of

Sera Siporax Professional - Biological Filtration

Maximum optimization of biological filtration 

1 Litre contains 270m2 of Bacteria growing surfaces!

The original sera siporax Professional is suitable for use in both freshwater and marine aquariums as well as in ponds. Not depending on the kind of filter (internal/external/trickle filter), it maximizes the surface required for biological purification and provides the optimal substrate for the settling of necessary filter bacteria.

Filter and breakdown processes in the bottom ground of natural waters are very important. Organic waste are processed by micro-organisms and are thus available for the natural cycle as a nutrient for aquatic plants – pollutants such as ammonium, nitrite and nitrate are removed. Since little waste per water amount is formed in nature, the present bottom surface is sufficient for housing a sufficient number of micro-organisms.
However, an aquarium accommodates a small biotope in little space. It is therefore necessary to maximally enlarge the settling area for ensuring complete and safe breakdown of organic remainders.
sera perfectly put this into practice with the unique high performance filter medium sera siporax.

Unlike other filter rings available on the market, sera siporax consists of sintered glass. The unique material convinces due to a special three-dimensional pore structure. This allows maximum surface increase. At the same time, the fine pores provide ideal settling conditions for bacteria that break down pollutants. Since it is an interconnected system, the bacteria are permanently rinsed by water nd so can break down pollutants with best possible efficiency. Furthermore, the unique pore array allows for self-purification of the substrate and thus very long filter holding times.
In combination with specialized bacteria, sera siporax even fulfills a variety of other special tasks, such as algae prevention or directed water conditioning.

sera siporax was developed on the basis of water biological studies. It is based on the pore structure of the nitrifying layers in the natural aquatic soil. The manufacturing process and the structure have been patented worldwide.

According to university studies, one litre of this natural aquatic soil layer has about 270 m² of usable bacterial surface. This layer has a thickness of 1.5 to 2 mm and consists of sand and mud particles. sera siporax is ideally modelled on this soil. Each individual ring offers the bacteria about 1m² of colonizable inner and outer surface.

The pore structure of sera siporax is open-pored and three-dimensionally cross-linked. This structure enables the formation of very efficient biofilms that grow into the pores and line their walls. The pores have the ideal size to leave enough space to guarantee a long-term water flow and the supply of bacteria. In the depth of the pore structure, where the oxygen content decreases, the biofilm also decomposes nitrate (denitrification). sera siporax has the optimal pore structure for nitrate decomposition.

In the biofilm of sera siporax not only nitrifying and denitrifying bacteria grow, but also organic substance degrading bacteria. As a result, dying bacteria do not clog the pores but are biologically degraded. The biofilm grows and shrinks with the load of the water and thus adapts to the demand. sera siporax is thus the only biologically self-cleaning filter material. The pore structure is perfect for bacterial colonisation.

Due to the special pore structure, sera siporax develops its own ideal water flow in the pore structure. This means that it can be used independently of the external flow velocity. It can therefore be used in fast, slow and trickle filters.

Many competitors advertise with larger surfaces between 400 and 800 m² per litre. However, all filter media with a larger surface area have smaller pores. Smaller pores cannot be colonized by a biofilm because the bacterial film fills the small pores and blocks the water flow. The bacteria soon die due to lack of oxygen and nutrients and the medium is only active on the outer surface. Measurements show that the filter performance decreases drastically within four weeks. With siporax, the degradation performance still increases after four weeks.

For the reasons mentioned above, there is currently no filter medium that comes close to the degradation performance of sera siporax.

One litre of sera siporax has the same degradation capacity as 34 litres of ceramic or clay filter medium, making it the cheapest filter medium on the market. All other filter bodies are much more expensive than a litre of sera siporax in terms of the usable surface.

Shipping Notes
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SKU: 99691349191

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Amazing, clean and natural ingredients!
Set name: Adult Tube - 3.4oz., Set name: Adult Tube - 3.4oz.
Literally the best sunscreen I have tried so far! Main ingredient is grass fed beef tallow which is what I’ve been looking for. I’m an outdoor/wedding photographer so I’m more susceptible to skin cancer due to genetics. Yesterday I used it all day for an outdoor wedding, reapplying every 2 hrs and this saved me so much!!! No white cast residue so I was applying quickly in between big moments and the formula is lightweight, no odor, goes on quick and smoothly and it’s not greasy! I have so much appreciation for the clean, natural ingredients
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Reviewed in the United States on May 24, 2026
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Khwaja Hedayat Ullah sediqi
Boise, US
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I really like this Grass-Fed Tallow Mineral Sunscreen. It feels natural on the skin and doesn’t cause irritation. The texture is smooth, easy to apply, and gives good sun protection. I also like that it uses mineral ingredients and doesn’t have a strong chemical smell. It leaves a slight white cast at first, but it blends in after a few minutes. Great option for people with sensitive skin
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Reviewed in the United States on May 20, 2026
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SD Tortuga
Lowell, US
★★★★★ 5
No burn after a week on Lake Havasu
Set name: Adult Tube - 3.4oz.
A week on Lake Havasu in the Arizona sun without any burning. The sunscreen goes on smoothly and works in quickly. No difficulty getting the white tint to go away. No odd smell. No sticky feeling. For reference I am of Scandinavian decent with fair skin and very blonde hair.
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Hilcia Acevedo
Waukegan, US
★★★★★ 4
easy to blend AND no white cast? UNREAL but true
Set name: Adult Tube - 3.4oz.
i was initially drawn to this sunscreen because i saw it had a great EWG score (1). i hesitated at first because of the price but very happy i went through with my purchase. i have medium to tan combination skin and this sunscreen was very easy to blend onto my face, given that it has a moisturizer like texture. and the best part? NO WHITE CAST. only removing a star because it is still pricey especially for the size which is why I've been limiting its use to my face lol
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Erin Barrom
Massapequa, US
★★★★★ 5
Great for sensitive skin!
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Great product! With sensitive skin this is wonderful without the white cast, grainy feel, and chemicals! Used on my kids and myself during softball days with no burns or rashes!! We always have a hard time finding good sunscreen that I don’t stress about! This is one I will buy again! Highly recommend!
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