3. Pump-Filter System | Pond Filter Media
In every second pond, the filter system is almost ineffective! However, a simple pump-filter system without UVC is essential for clear water without algae, especially with fish stock. With these brilliant products for pond filter media, you can equip your existing filter system for 100 times better filtration and enjoy wonderfully clear pond water and a permanently clean biological filter after adding BioTeich Aktiv.
5 products
BioPond Phosphate Converter
BioPond MAXIMUM
Bio Pond High-Performance Filter Set
💧 FAQ: Filter technology & bio-materials for a clear natural pond
Welcome to the expert area for your pump-filter system. Here you will find answers to the most important questions about biologically optimized pond filtration with the BioTeiGa components.
Why is a well-designed pump-filter system so important?
A filter that does not work optimally can throw the entire pond ecosystem off balance. Many commercial systems only filter mechanically – that is often not enough. With the sophisticated BioPond system, on the other hand, you achieve:
✅ crystal-clear water instead of algae infestation
✅ biological self-cleaning instead of constant maintenance
✅ healthy fish and stable water conditions
Which filter materials are ideal for my pond?
Use coordinated components with clear functions – everything from one source:
🟢 BioTeich MAXIMUM
➡️ High-performance biofilter material for maximum microorganism colonization – 100 times stronger biological filtration than conventional media.
🟣 BioTeich Phosphate Converter
➡️ Special filter medium for permanent binding of phosphate and nitrogen compounds – stabilizes the pond balance naturally.
🧽 Pre-filter foam sponge (not from our range)
➡️ Used for coarse dirt filtration and protects the biological material – can be rinsed regularly.
How do I properly maintain my biofilter?
A biological filter requires different maintenance than a purely mechanical one:
- Do NOT rinse filter media such as BioTeich MAXIMUM – otherwise you will kill off the microorganisms.
- Only clean pre-filter sponges regularly (e.g. when flow rate decreases)
- After long periods of inactivity or deep cleaning: add BioTeich Aktiv to quickly rebuild the biology
🧼 Important: Coarse dirt catchers such as foam sponges or Japanese mats should be cleaned regularly. Biological filter media, on the other hand, must not be cleaned during the pond season – otherwise the vital microorganisms and biofilms will be destroyed.
❗ The consequences would be cloudy water, increased algae growth and elevated pollutant levels.
🔍 Nevertheless, you should regularly visually inspect the condition of the biological filter material to permanently maintain its functionality.
What about UVC lamps in the filter system?
🚫 Not recommended for BioPond systems!
💡 UVC light prevents the cell division of microorganisms – and these are crucial for the natural self-cleaning of your pond.
🔬 The problem: UVC does not distinguish between beneficial and harmful bacteria. It kills all of them – including the microorganisms that break down pollutants in the biofilter and keep your water clear.
❗ This can destroy the entire pond biology in the long term, disrupt the balance and reduce natural mineralization.
🌱 Our recommendation at BioTeiGa: Do without UVC technology and trust in biological processes. With the right filter material, microorganisms and targeted nutrient binding, you will achieve permanently clear, healthy water – entirely without shortcuts.
Which pump is suitable for my filter system?
For optimal performance, the following applies:
- 💧 The pump should circulate the entire pond volume every 12 hours (without fish) or every 6 hours (with fish).
- 🔄 Position the pump as far away as possible from the filter outlet.
- ⬆️ Hang it at least 20 cm above the bottom to avoid sucking up sludge.
- ⚡ Keep the pump running 24/7 during the pond season – for consistently good water values.
Sample calculation:
10,000-litre fish pond ➜ 10,000 / 6 = approx. 1,700 l/h recommended pump output
How large should the volume of my filter be?
Rule of thumb for biofilters at BioTeiGa:
Pond volume × 2 : 1000 = filter volume in litres
Example: 8,000-litre pond ➜ 8,000 × 2 : 1,000 = 16 litres filter volume
How do I correctly position the filter and return flow?
📍 Always position the filter outlet opposite the pump. This ensures that the water circulates completely through the pond and no dead zones form.
🔁 Do not introduce the return water directly at the surface, but slightly below it. This moves the water from deeper layers and supplies it with oxygen more effectively.
How do I integrate a stream, waterfall or water feature sensibly?
🌊 A stream, waterfall or water feature look great – but they do NOT replace a filter system. They should:
- be operated via a separate pump – so the important main filter circuit remains stable.
- the 2nd water circuit can then be flexibly switched on or off!
☀️ In warm months, the water in the stream can heat up significantly. This reduces the oxygen content in the pond. Therefore:
✅ Only allow the pump to draw water from the upper water layer so that the cooler, oxygen-rich water in the lower area is preserved.
How do I use my pump-filter system as efficiently as possible?
🔧 To ensure your system delivers top performance on a permanent basis, follow these pro tips:
- ✅ Check regularly whether the pump is still drawing in properly – especially after long periods of inactivity or algae growth.
- ⬆️ Keep at least 20 cm away from the pond floor – to avoid sucking up sludge and clogging the system.
- 🔁 Position the pump as far away as possible from the filter outlet – this creates effective pond circulation.
- 🕒 Run continuously (24/7) – interruptions disrupt biological filter performance.
- 🔄 Circulate the entire pond water only 2 to 4 times (with fish) per day:
With this operating method, you achieve the best balance between clarity, oxygen supply and biological stability.
Reviews
What our customers say
Johannes Z.
Phosphate converter
Peter B.
Bio Pond High-Performance Filter - Set
Anja O.
finally a clear pond with maximum clarity
Thomas M.
Great
Hans J. K.
Clear water
Steffen H.
Pleasantly surprised
Simone W.
Wonderfully clear water
Petros S.
Very good!
Helmut S.
All good even in the filter system
Erika W.
Phosphate converter evaluation
Volker G.
Algae in the pond
Manfred H.
Applied for years
Klaus K.
In this case, I was happy to be proven wrong
Michael K.
6 stars 100% best product on the market
Jürgen L.
Product lives up to its promise!
Michael K.
5 stars NOW!
Hans-Herrmann R.
BioTeich maximum
Thomas M.
Super Pond Filter
Werner K.
Bio Pond Maximum
Veronika P.
Excellent service