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Oase Biotec Screenmatic Gravity Filters

The Oase range of Biotec Screenmatic filters are the most technologically advanced gravity filters on the market. Their unique sponge system is designed to hold the maximum amount of waste before needing cleaning. They feature a Screenmatic system, which is a unique electronically operated screen that automatically cycles and extracts the largest particles and debris, significantly increasing the time it takes for the sponges to become blocked. This drastically cuts down on maintanence and increases the capacity of the filter for very little energy, making it suitable for much larger ponds than normal gravity filters. Because of their high waste handling capacity, there is no better filter system we know of for messy Koi fish and large ponds up to 140,000L.

  • Suitable for very large ponds. No other brand has gravity filters big enough for ponds this large
  • Unique sponge and screenmatic system significantly increases the efficiency and reduces required maintanence (cleaning) of your filter
  • Physically large filters with many individual sponges produce a very high capacity suited to large ponds or koi ponds
  • An Oase Bitron Ultra Violet Clarifier can be matched with and then integrated onto a suitably sized Biotec filter if required, to help eliminate suspended microscopic algae (green water)
  • Easy to clean, saving time
  • Advanced design creates perfect environment for nitrifying bacteria to live, reducing ammonia and other toxic substances in your pond
  • High quality German engineering, uv stabilised plastic leads to a long service life
  • The filter sponges are replaceable although they last many years. All spare parts are available
  • Flushing valve to remove waste from the bottom of the filter
  • Larger filters can be partially recessed in the ground to make a lower profile

***Please note: If you are ordering the Biotec 140000 Screenmatic Filter it is large (see dimensions below) and heavy (100kg) and when the driver arrives to deliver it there must be at lest 2 additional people, or a forklift, available to assist with unloading. Depending on your location, there may be additional delivery charge with this filter due to it's bulk. Please call us on 1800 607 388 to confirm your delivery costs, if applicable.

Aussie's Observations about  Biotec Screenmatic Gravity Filters

Budget • Good • Better • Best • Superior

Any pond filtration, especially Koi, turtles and large ponds. Ideal for ponds up to 140,000 litres in size.

The Screenmatic system is completely unique and market leading. The most efficient filter available and in a class of it's own. Nothing else is capable of handling such large capacities or concentrations of fish.

Large physical size can sometimes be hard to integrate into your landscape, however smaller filters are much, much less effective for larger ponds or koi ponds.

Product Price Filter TypeIdeal Flowlitres per hourMin Flowlitres per hourMax Flow L/Hourlitres per hourPond Max Vol (No Fish)litresPond Max Vol (With Fish)litresDimensionsL x W x H (mm)Back Wash SystemUVC FittedUltra violet lamp fitted as standardWarranty YearsCleaning IndicatorCanister Above GroundIf canister buried, how much shows above ground?Foam FiltersBio BallsFor micro-organism growthPower Cord LengthHose Tails SuppliedHose Tails OptionalMax Pump Pressure
Oase Biotec 12 - 40000 Screenmatic Filter Gravity Filter
20,000 with some fish, 10,000 with KOI fish
788 x 590 x 445Manual*
Compression of filter foams by hand
Install a Bitron C 36 to 110 Watts
2 + 1Yes - 8*
2 Blue, 3 Red, 3 Purple
Special Granulate*
2.5 KGS
Power for screen operation
Inlet 25, 32, 38 mm. Outlet 75 mm, Sludge 50 mm.
5 metre head
Oase Biotec 36 - 140000 Screenmatic Filter Gravity Filter
70,000 Pond with some fish. 35,000 with KOI fish.
1200 x 800 x 760Manual*
Compression of filter foams by hand
Install Oase Bitron C 36 to 110 watts
2 + 1Yes - 18 Foams*
4 Blue, 7 Red, 7 Purple.
Special Granulate*
5 metres*
Power cord for Screen operation.
25 / 32 / 38 / 50 mm*
25,32,38,50 Inlet. 110 mm Outlet
6 metre head
Oase Biotec 90000 Screenmatic Filter Gravity Filter
45,000 Pond with some fish. 22,500 Pond with KOI fish
788 x 590 x 645Manual*
Compression of filter foams by hand
Install Oase Bitron C 36 to 110 watt
2 + 1Yes - 16*
4 Blue, 6 Red, 6 Purple
Special Granulate*
Power for Screen operation
Inlet 25 / 32 / 38 / 50 mm inlet. Outlet is DN110 mm. Sludge drain is DN50 mm
6 metre head
Oase Biotec 18 - 60000 Screenmatic Filter Gravity Filter
30,000 Pond with some fish. 15000 Pond with KOI fish
788 x 590 x 445Manual *
Compression of filter foams by hand
Install a Oase Bitron C 36 to 110 Watt
2 + 1Yes - 8*
2 Blue, 3 Red, 3 Purple.
Special Granulate*
3.5 KGS
Power for screen operation
25/32/38mm Inlet 75mm Outlet*
Inlet 25, 32, 38 mm. Outlet 75 mm. Sludge 50 mm.
5 metre head

Pond volumes for Biotec filters

Examples below represent the possible pond size in litres when using the specified Oase pumps and UV clarifiers. Other pumps, or use without UVC will vary capacity.


40000 60000 90000 140000
When using these Pump / UVC combinations> the listed pond sizes would be possible Aquamax Eco Classic 11000
Bitron C 36W
Aquamax Eco Classic 17500
Bitron C 55W

Aquamax Eco Premium 20000 Bitron C 110W

Aquamax Eco Expert 36000
Bitron C 110W
Near natural garden ponds with plant zones, without fish. - litres 40,000 60,000 90,000 140,000
Near natural garden ponds with plants and a medium fish stock** - litres 20,000 30,000 45,000 70,000
Garden ponds and Koi ponds with heavy fish stock *** litres 10,000 15,000 22,500 35,000
*Near natural garden ponds with plant zones, without fish.
**Near natural garden ponds with plants and a fish stock of up to 1,000 grams per 1,000 litres
*** Garden ponds and Koi ponds with fish stock of 1,000 to 3,000 grams per 1,000 litres

Suitable pumps / UVC's for Biotec filters


40000 60000 90000 140000
Suitable Oase Bitron UV Clarifier for this filter Bitron
24C to 36C
36C to 55C
36C to 72C
72C to 110C
Suitable Oase pumps**

 Aquamax Eco Premium 8000, 12000

Aquamax Eco Classic 8500 - 11500

Aquamax Eco Premium 12000

Aquamax Eco Classic 11500 - 17500

Aquamax Eco Premium 12000-20000

Aquamax Expert 20000

Aquamax Eco Classic 17500

Aquamax Expert 20000,30000

Aquamax Eco Premium 20000

Suitable - Non Oase pumps Laguna 7600 - 11000 Laguna 11000 - 16000 Laguna 16000  

**Special note, if using a waterfall or a long hose between pump and filter the pump will need to be larger to allow for the reduced flow caused by the head (pumping height, and/or hose length)   If in doubt Fill in one of our e-mail help forms and let us do all the calculations for you. About Biotec filters
The patented silt disposal system allows quick and easy cleaning of the filter and ensures if used correctly the continued development of micro-organisms.

These filters are generally pump fed filters and multi chamber filters, which do not only mechanically filter out dirt from the pond water but also encourage the colonisation of special micro-organisms for the biological filtration process.