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Home / Product Types / Filters / Gravity Filters

Gravity Filters

Some of the most cost effective and low maintenance systems available. Water from the pond is pumped to the filter where it then flows through the filter- overflowing and returning to the pond via gravity. These filters must be kept above the pond- usually installed at the beginnings of waterfalls.

Gravity Filters
OASE BioPress UVC Filter 20-25 free gift certificate

The BioSmart Gravity Filters are a multi-stage mechanical and biological filtration system in a compact package, designed for medium ponds or for ponds with moderate biological load (some fish).

During biological filtration, the water is channeled through a series of filter foams that create a special environment by allowing the settling of beneficial bacteria. During this stage, harmful ammonia and nitrites are converted to nitrates, which support plant life in the pond.

  • Innovative Flow-Through filter design provides maximum oxygenation
  • High-surface area filter foams provide exceptional biological filtration capability
  • Distinct filter zones promote the settlement of a variety of beneficial bacterial responsible for different phases of the nitrogen cycle, which increases the conversion of harmful ammonia in your pond
  • Advanced features include the built-in cleaning indicator notifies you when the filter needs cleaned and water temperature display tells you the water temperature at all times
  • Cleaning handles for convenient maintenance allow for easy cleaning without needing to remove or manually unclog the filter foams
  • After clearing the filter foams, the sludge drain can be opened for easy removal of coarse debris from the unit
  • For best results and clear water guaranteed, use with an appropriately sized OASE pump and UV clarifier
Oase BioSmart Gravity Filters

Oase BioSmart Gravity Filters

  Icons SKU Max Pond Size Max Pump Size No. of Filter Foams Inlet Size Outlet Size Drain Size UVC Dimensions Add
Oase BioSmart 5000 Gravity Filter
Add to Cart to See Price
56929
5,000 Gal
1,450 GPH
4
3/4" - 1-1/2"
3"
2"
-
22" x 22" x 16"
Oase BioSmart 10000 Gravity Filter
Add to Cart to See Price
56930
10,000 Gal
2,110 GPH
9
3/4" - 1-1/2"
3"
2"
-
30" x 22" x 16"
OASE BioSmart Gravity Filters Replacement Parts

Flow through filters with biological and mechanical filtration clean and clear pond water which flows back down to the pond by gravity. Oase BioTec Screenmatic² automatically separates debris using the self-cleaning screen, depositing coarse debris into the removable tray. High efficiency filter system features 3 different densities of foam harboring a variety of beneficial bacteria that remove harmful ammonia and nitrites. Qualifies for the Oase Clear Water Guarantee when paired with the proper pump and UVC Clarifier.

Features:

  • Intelligent cleaning sensor senses debris and activates cleaning screen
  • Manual belt run button for manual operation of cleaning screen
  • LED indicates status of cleaning bar and screen
  • Rubberized separator lip scrapes debris off screen and into tray
  • Removable sludge tray for easy maintenance
  • Built-in overflow holes keep filter operational even when sludge tray is full
  • Sludge drain with integrated slide valve removes sludge and dirty water from system
  • Optimized water distributor evenly disperses water flow over screen
  • Add an optional Bitron C UVC clarifier to any ScreenMatic² filter system for enhanced clarity and cleaner water

Oase BioTec ScreenMatic² Filter

Oase BioTec ScreenMatic² Filter

  SKU Pond Volume Max Flow Hose Size Outlet Filter Foams Phosless Filters Dimensions Add
Oase BioTec 18000 ScreenMatic²
Add to Cart to See Price
42975
18,000 gal
2,900 GPH
1", 1-1/4", 1-1/2"
3" adaptor
8 (2 blue, 3 red, 3 purple)
2
31"L x 23"W x 21.5"H
Oase BioTec 24000 ScreenMatic²
Add to Cart to See Price
44120
24,000 gal
3,300 GPH
1", 1-1/4", 1-1/2"
4"
16 (4 blue, 6 red, 6 purple)
4
31"L x 23"W x 25.4"H
Oase BioTec 38000 ScreenMatic²
Add to Cart to See Price
42976
38,000 gal
4,600 GPH
1", 1-1/4", 1-1/2", 2"
4"
18 (4 blue, 7 red, 7 purple)
12
47"L x 31.5"W x 30"H
Oase BioTec 39000 ScreenMatic²
$4,499.99 $3,959.99 | 9,899 Points
93036
39,000 gal
4,620 GPH
1", 1-1/4", 1-1/2", 2"
4"
18 (4 blue, 7 red, 7 purple)
12
52.5"L x 25"W x 33"H

Pump, Filter, UVC & Tubing Complete Package

The Bermuda Pond Filter Kit makes pond filtration easy, including the right filter and UV clarifier to clear water in small to medium garden ponds. The filter box can be part buried for discrete placement and sponges cleaned at the pull of a handle.

  • Pump, Filter, UV & Tubing included
  • Solids handling pump
  • Powerful UV Clarifier
  • Mechanical & Biological Filtration
  • Easy to clean sponges
Bermuda Pump & Filter Kits

Bermuda Pump & Filter Kits

  Icons SKU Max. Pond Size Pump UV Tubing Add
BER0401
1,500 gal
400 GPH
9W
15 ft
BER0402
2,400 gal
500 GPH
11W
15 ft

The Aquascape Pond Filter Urn is ideal for smaller ponds in need of filtration, including preformed ponds or container water gardens. Aquascape Pond Filter Urn can easily be incorporated into existing ponds, ideal for use with Aquascape Ultra or AquaJet Submersible Water Pump. The decorative filter urn gives an added trickling effect and sound of running water to the pond. The unit comes complete with Mechanical and biological filter media and allows for easy access to clean with the removable lid.

Aquascape Pond Filter Urn for Small Ponds

Aquascape Pond Filter Urn for Small Ponds

  Icons SKU Max GPH Pond Volume Inlet Fitting Dimensions Dimensions Add
77006
400
500 gal
1/2"
20"L x 12"W x 10"H
77011
1,100
1,500 gal
3/4"
28"L x 15.5"W x 15.5"H

Aquascape Pond Filter Urn for Small Ponds

  Icons SKU Add
 
077012
 
77007

Matala BioSteps-II filter maximizes Matala filter media performance. The rugged BioSteps-II contains an amazing 200 sq. ft. of surface area for beneficial bacteria growth. Combined with a cross flow design that traps and processes more debris at high flow rates, you get unparalleled mechanical and biological filtration for superior water quality.

Includes:

  • State of art progressive filtration - 2 Green Matala Pads, 2 Blue Matala Pads, 2 Gray Matala Pads. 
  • "Swivel Inlet Fitting" with 3/4", 1", 1-1/4" and 1-1/2" barbed size
  • Outlet fitting for 1-1/2" or 2" pipe connection or connection to optional Waterfall Spillway. The tank is an open flow "gravity return" to the pond.
  • Enhances growth of different ecological communities of bacteria that will colonize in the filter.
  • Sloped bottom with extra sink at outlet for easy draining of waste.
  • Rugged and modular design allows for future expansion.
  • Available with UV or waterfall spillway
Matala BioSteps-II Filters

Matala BioSteps-II Filters

  Icons SKU Dimensions (LxWxH) Ponds Up To (Gallons) Max Flow UV Add
Matala BioSteps-II Filter
$247.00 $199.00 | 498 Points
99977
23-3/16" x 15" x 20-3/16"
2,700
1,060 GPH
-
Matala BioSteps-II Filter w/ 16 watt UVC
$430.00 $368.00 | 920 Points
99978
23-3/16" x 15" x 20-3/16"
2,700
1,060 GPH
16 watt
Matala BioSteps-II Filter w/ Waterfall
$289.00 $233.00 | 583 Points
99931
23.2" x 15" x 20.2"
2,700
1,060 GPH
-
Out of Stock
Matala Biosteps-II Filter Replacement Parts

Advanced filtration systems for Koi ponds now with NEW K+ Media

Building on the tried and tested technology that has been present in the world renowned Nexus, the team at Evolution Aqua have gone even further to enhance their number one koi pond filter. 

The Nexus 220+ and Nexus 320+ filters now come with a new filter media called K+ Media in the moving bed outer chamber for vastly improved biological filtration and faster filter maturation. The new Nexus+ filters are now supplied "auto ready", with factory fitted fixings already in place, making it even easier to upgrade to the Nexus Automatic Cleaning System.

How the Nexus Works

Water from the pond enters the nexus via the inlet into the inner chamber which works as a vortex, allowing larger solids to settle out. Water then passes through the grills in the stainless steel “Eazy” filter, where the finer particles are removed by the static bed K1 Micro® filter media. The clean water then passes to the outside chamber of the Nexus for biological treatment before returning to the pond. At this stage, biological breakdown occurs through different strains of bacteria and filter feeders living on the protected surface area of each K1+ Media filer. The bacteria convert Ammonia and Nitrite into less harmful Nitrate. Water then passes through the exit grill into the outlet and returns to the pond.

Evolution Aqua Nexus Filtration Systems

Evolution Aqua Nexus Filtration Systems

  Icons SKU Max Pond Size Max Flow Rate Volume of Water in Nexus Volume of Water in Inner Chamber Volume of Water in Outer Chamber Add
NEXEAZ220
4,800 gal
2,640 GPH
134.72 Gal
27.73 Gal
106.99 Gal
NEXEAZ320
9,000 gal
3,431 GPH
221.90 Gal
54.15 Gal
167.74 Gal
CNEXEAZ220
4,800 gal
2,640 GPH
134.72 Gal
27.73 Gal
106.99 Gal
CNEXEAZ320
9,000 gal
3,431 GPH
221.90 Gal
54.15 Gal
167.74 Gal

A compact member of the Nexus family, the EazyPod is a mechanical and biological filter system for garden ponds up to 5,333 gallons or Koi ponds up to 2,640 gallons. The EazyPod utilises static K1 Micro, which provides enhanced biological benefits, even when using the EazyPod solely as a mechanical waste filter.

  • Mechanical and biological filtration.
  • Very eazy to install and operate.
  • Quick and eazy cleaning cycle.
  • Works equally well pump or gravity fed.
  • Ideal as a filter on a quarantine system.
  • Also ideal for use as a pre-filter, polisher or on a skimmer line.
Evolution Aqua Eazy Pod

Evolution Aqua Eazy Pod

  Icons SKU Max Pond Size with ornamental fish Max Pond Size with Koi Max Feed Rate Volume of Water in Filter Max Flow Rate AirPump UV-C Dimensions Add
Evolution Aqua Eazy Pod
$1,099.99 $989.99 | 2,475 Points
EAZYPOD
5,333 Gal
2,640 Gal
100g-125g per day
21 Gal
2,640 gal
-
-
26"H x 28"L x 23"W
Evolution Aqua Eazy Pod Air
$1,349.99 $1,214.99 | 3,037 Points
EAZYPODAIR
5,333 Gal
2,640 Gal
100g-125g per day
21 Gal
2,640 gal
AirPump70
-
26"H x 28"L x 23"W
Evolution Aqua Eazy Pod Complete
$1,549.99 $1,394.99 | 3,487 Points
EAZYPODUV
2,640 Gal
2,640 Gal
100g-125g per day
21 Gal
2,640 gal
AirPump70
18 Watt PL-L
26"H x 28"L x 23"W

Evolution Aqua Eazy Pod

  Icons SKU Add
Evolution Aqua 18 Watt Bulb for EazyPod UV
$69.99 $59.49 | 149 Points
 
EVOBPLL18

The EazyPod Automatic is a self-cleaning, mechanical and biological filter system for ponds up to 2,640 gallons.

The integrated control box contains an adjustable timer which initiates a cleaning cycle automatically - meaning your filter will clean itself even when you’re not there! Inside the control box, the electronic connector blocks control the automated waste valve, along with your choice of circulating pump (not supplied). It even houses an integral air pump which kicks in automatically to clean the K1 Micro media.

Crystal clear, healthy water is achieved by K1 Micro filter media, which also provides enhanced biological benefits by way of its protected surface area.

The Eazypod UV Automatic features an integrated 18 Watt UVC built in to the inlet section of the filter, helping to clear green water. Available in 2 models, users can select either the EazyPod Automatic or the EazyPod UV Automatic (with built-in 18 watt UV). 

Evolution Aqua Eazy Pod Automatic

Evolution Aqua Eazy Pod Automatic

  Icons SKU Max Pond Size with ornamental fish Max Pond Size with Koi Max Feed Rate Volume of Water in Filter Max Flow Rate AirPump UV-C K1 Micro Dimensions Add
Evolution Aqua Eazy Pod Automatic
$1,799.99 $1,619.99 | 4,050 Points
EAZYPODAUTO
2,640 Gal
2,640 Gal
100g-125g per day
21 Gal
2,640 GPH
Built-in inside control box
-
4.75 Gal
26"H x 24"L x 23"W
Evolution Aqua Eazy Pod Automatic with UV
$1,999.99 $1,799.99 | 4,500 Points
EAZYPODAUTOUV
2,640 Gal
2,640 Gal
100g-125g per day
21 Gal
2,640 GPH
Built-in inside control box
18 Watt PL-L
4.75 Gal
26"H x 24"L x 23"W

The Cetus sieve is a totally new, bow screen pre-filter, made using the latest rotational molding technology. With all of its benefits and build quality, it is undoubtedly the best of its kind on the market today, regarding quality and performance! It is designed to efficiently and effectively remove large amounts of mechanical waste from a pond. It can be set-up gravity OR pump fed and has many benefits over the original bow screen technology.

This Cetus has a variable inlet height using the unique patented Pondflow regulation system – for use when gravity fed. This allows water levels within the pond to drop without causing the circulating pump to be starved of water. The Cetus will allow a skimmer or a bottom drain to accept vast amounts of waste without excessive cleaning needed to be carried out. The water must then be pumped to either a normal filter above pond level (Nexus Eazy/Eazy Pod) or to a pressurised filter.

If pump fed, the sieve is placed above pond water level and then the exit water is gravity dropped into your main filter.

The Cetus sieve is a bow screen pre-filter, suitable for pre-filtration of any biological filter including all pressured filters. It is advised that all pressurised filters be pre-filtered using a Cetus to reduce excessive backwashing and maintenance due to heavy solids.

Evolution Aqua Cetus Sieve

Evolution Aqua Cetus Sieve

  Icons SKU Max Flow Inlet Outlet Outlet Waste Screen Dimensions Add
Evolution Aqua Cetus Sieve - Pump or Gravity Fed
$1,599.99 $1,359.99 | 3,400 Points
CETUSP
4,000 GPH
1.5"
4"
3"
300 micron
33.5"L x 22.5"W x 37"H

Oase 3rd Gen FiltoClear Filter & AquaMax EcoClassic Pump Kits take the guesswork out of selecting the correct pump and filter combination. 25 ft. of 1-1/2” ID kink-free tubing included. Available in three sizes, there is an Oase filter kit for almost any pond configuration. Buying a filtration kit is simple and provides the best overall value as components are matched that work well together as a team.

    3rd Gen FiltoClear Features:
  • In-line pressure filter offers biological and mechanical filtration, with built-in UV clarifier
  • High quality, impact resistant body can be buried up to the locking ring
  • Backflush filter and direct waste with Easy-Clean Technology without opening the filter or removing the cover
  • 1-1/2", 2" and Sch 40 adapters & Hose Clamps included
    AquaMax EcoClassic Features:
  • Asynchronous pumps are designed for in-pond applications where debris is delivered through the pump to a filtration system
  • Large-surface, wrap-around pre-filter allows coarse debris particles up to 1/3" to pass through pump
  • 1", 1-1/4", 1-1/2" barbed fittings, Sch 40 1-1/2" and 2" & Hose Clamps included
Oase 3rd Gen FiltoClear Filter & AquaMax EcoClassic Pump Kits w/ FREE Tubing

Oase 3rd Gen FiltoClear Filter & AquaMax EcoClassic Pump Kits w/ FREE Tubing

  Icons SKU Add
C91669
C91670
C91671

Installed and buried out of sight at the base of the downspout to capture and remove a variety of pollutants and debris that may be flushed out in the system during a heavy rain. Incoming rainwater is passed through a series of mechanical filters that remove leaves, twigs, seeds, and small sediment that accumulate on the surface of the roof between rain events. The first stage of filtration consists of a grated lid and layer of gravel (not included) that remove larger debris. The second stage of filtration is a 300-micron net that effectively removes finer particulate such as sediment composed of roofing material, dust, and other debris. Filtered rainwater then discharges into the rainwater harvesting system. The filter includes a molded hose tail that can accommodate 3″ or 4″ corrugated drain pipe.

  • Captures and removes a pollutants and debris from rainwater
  • Removes leaves, twigs, seeds, and small sediment that accumulate on the roof
  • Two stages of mechanical filtration remove larger and finer particulate
  • Durable, rotationally molded construction
  • Molded hose tail accommodates 3″ or 4″ corrugated drain pipe
Aquascape Downspout Filter

Aquascape Downspout Filter

  Icons SKU Add
 
30095
Out of Stock
Aquascape Downspout Filter
$329.99 $296.99 | 742 Points
30166

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