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Water Filtration . . . to ensure clean and healthy ponds.

Degradation of pond water quality due to the presence of fish waste,  unconsumed fish food,  ground  "run off" ,  and simple  "fall out"  of dust,  leaves and pollen can be disastrous for the good health of your pond.   Unwanted nutrients will aid the growth of unsightly algae,  while toxins in the form of ammonium and nitrite will endanger the health of fish and other pond dwellers.

Leaf & Stone Garden Gallery stocks a broad range of pond filtration products including:

Oase (premium quality products) -
  • Biosmart Biological gravity filters with Ultra Violet Clarifier (UVC),
  • Biotec Biological flow through filters,
  • Filtoclear Biological pressure filters with inbuilt UV clarifiers,  and
  • Bitron Ultra Violet Clarifiers.
  • Filtral  all-in-one pond filtration system for ponds up to 5000 Litres capacity (less with fish stock)
Oase,  Hydrogarden & Aquagarden (Mid Range & Budget Products) -
  • Hydrogarden Petmate pressure filters,
  • Blagdon Minipond gravity filters,
  • Oase Biopress pump & pressure filter sets
  • Oase Vitronic UV Clarifiers,  and
  • various budget Ultra Violet Clarifiers
A combination of Mechanical and  Biological Filtration  and an  Ultra Violet Clarifier  (UVC),  all connected to a properly designed  Filtration Pump,  will ensure that unhealthy,  green and sludgy ponds are a thing of the past.

ClearPond Algaeguard electronic algae control units (through water mineralisation) are also available,  together with Pre-filters incorporating open cell Foam,  BIOtube or BIOmat   filtration media.

Please refer to the section "  Why is selecting a Filtration System so complicated ?  " at the end of this page for very important information regarding factors which should be taken into account when selecting pond filtration systems.

[ Alternatively,  call in to Leaf & Stone Garden Gallery  -  51 McKillop St , Geelong   -  or phone us  -   (03) 5221 8083  -  so we can discuss your particular requirements and come up with a package to meet your needs and suit your budget. ]

Biosmart Biological/ UVC Gravity Filters
  Price Max. Flow
(Lt/hr)
UV Power
(Watts)
Max. Pond Volume
(litres)
Biosmart 8000 $399 2,750 9 W 8,000 Lt
Biosmart18000 $439 5,500 * * * 18,000 Lt
- with Vitronic18 $808 5,500 18 W 18,000 Lt
Biosmart 36000 $799 8,000 * * * 36,000 Lt
- with Vitronic36 $1,298 8,000 36 W 36,000 Lt
With Biosmart  filters,  Oase offers proven technology to ensure clear and healthy pond water,  thanks to the combination of a large filter foam surface area and integrated* UVC technology.
*  Vitronic UVCs are designed to attach seamlessly to the Biosmart 18000 and 36000 filter housings.

Pond volume is the maximum recommended for Australia,  for near natural ponds with water plants but minimal fish stock.

Oase Biosmart gravity filter

Oase Biosmart Filter

Minipond gravity filters

Minipond Gravity Filter


Minipond Biological/ UVC Gravity Filters
  Price Max. Flow
(Lt/hr)
UV Power
(Watts)
Max. Pond Volume
(litres)
Minipond 4500 $260 2,250 5 W 4,500 Lt
Minipond 6000 $285 3,000 9 W 6,000 Lt
Minipond 10000 $495 5,000 18 W 10,000 Lt
Minipond 14000 $595 7,000 24 W 14,000 Lt
Minipond filters create a clean, clear and healthy environment for your fish and require minimal maintenance.   They include a high performance UVC to clear green water algae.
  • Graded foam filter pads remove dirt and waste.
  • Ceramic biological filter media prevent the build up of harmful toxins.
  • A replaceable polymer wool pad removes fine waste particles and polishes the water.
  • A carbon impregnated pad removes chemical pollutants.

Oase Biotec Flow Through Biological Filters
  Price Max. Flow
Rate

(litres/hour)
Max. Pond
Volume
(litres)
Biotec 10.1 $799 8,000 30,000 Lt
Screenmatic:
Biotec 40000 $1,999 12,000 50,000 Lt
Biotec 60000 $2,399 12,000 60,000 Lt
Biotec 140000 $3,999 23,000 140,000 Lt
Flow Through filters are similar to gravity filters but with the added benefits of providing a rich supply of oxygen and high flow rates.

Screenmatic filters incorporate a moving screen which provides for the extraction of course particles before they reach the sponge filters.   This debris is deposited in a collection tank for simple removal.

Total Filtration Systems,  including a suitable Ultra-Violet Clarifier and an appropriate Filtration Pump are required to support ponds with the maximum volumes listed.

Pond volumes are the maximum recommended for Australia,  for near natural ponds with water plants but minimal fish stock.

Oase Biotec Filter

 

Oase Biopress Filter


Oase Biopress Pump & Filter sets
  Price Pump
Capacity

(litres/hour)
UVC
Power

(Watts)
Max. Pond
Volume

(litres)
Biopress 4000 $449 1,500 7 W 4,000 Lt
Biopress 6000 $679 2,500 9 W 6,000 Lt
Biopress 10000 $799 3,400 11 W 10,000 Lt
Oase Biopress Pressure Filter sets consist of a Biopress Filter with integrated UVC and a matching Submersible Filter/ Watercourse Pump.   The set comes complete with all the necessary hose fittings for quick assembly.

Easy Filter maintenance is achieved using the cleaning function built into the filter.  

These filter systems are ideal for natural ponds or ponds with moderate fish stock.   They are not recommended for Koi ponds or heavily stocked fish ponds.


Oase  Filtoclear Pressure Filters
. . . with inbuilt UVCs.
  Price Max. Flow
Rate

(litres/hour)
UV
Power

(Watts)
Max. Pond
Volume

(litres)
Filtoclear 3000 $539 4,000 9 W 3,000 Lt
Filtoclear 6000 $799 6,000 11 W 6,000 Lt
Filtoclear 12000 $1,269 8,000 9 W 12,000 Lt
Filtoclear 16000 $1,439 12,000 24 W 16,000 Lt
Filtoclear 30000 $1,699 16,000 55 W 30,000 Lt
Filtoclear pressure filters combine innovative filter technology with an effective inbuilt UV Clarifier.

All models come with Oase’s very effective Easy Clean feature,  which allows simple yet thorough cleaning without the need to open the filter assembly.   Each Filtoclear is equipped with a multi-directional valve for cleaning and flushing,  and with an integrated cleaning mechanism for the filter sponges.   They also come with 3 year and clear water guarantees.

Filtoclear pressure filters are also equipped with an indicator light and optical functional control of the UV Clarifier.

Pond volumes are the maximum recommended for Australia,  for near natural ponds with water plants but minimal fish stock.

Oase Filtoclear Filters

 

Petmate pressure filters

Petmate Pressure Filters


Petmate Pressure Filters
. . . with inbuilt UVCs.
  Price Max. Flow
Rate

(litres/hour)
UV
Power

(Watts)
Max. Pond
Volume

(litres)
5000 PUV $440 2,500 9 W 5000 Lt
10000 PUV $760 5,000 9 W 10,000 Lt
15000 PUV $860 7,500 13 W 15,000 Lt
30000 PUV $1,900 15,000 24 W 30,000 Lt
Petmate pressurised pond filters combine UV clarification and biological filtration to guarantee crystal clear,  purified water with minimal maintenance.   The comprehensive range caters for ponds to 30,000 litres.   All of the Petmate Filter models come with 3 year and clear water guarantees.

Larger models (starting with the 10000PUV) feature Powerclenz - the patented automatic cleaning system which enables the filter to be cleaned at the twist of a knob.

Pond volumes are the maximum recommended for Australia,  for near natural ponds with water plants but minimal fish stock.


Oase Bitron Ultra Violet Clarifiers
  Price Max. Pond
Volume

(litres)
Max. Flow
(litres/hour)
[ No bypass  /  Max bypass ]
UV Power
(Watts)
Bitron 24C $899 24,000 3,500  / 15,000 24 W
Bitron 36C $1,289 36,000 4,500  / 30,000 36 W
Bitron 55C $1,399 55,000 6,500  / 30,000 55 W
Bitron 72C $1,599 72,000 9,000 / 40,000 72 W
Bitron 110C $1,799 110,000 12,000 / 40,000 110 W
 
Bitron C Ultra Violet Clarifiers fight algae effectively with intelligent UVC technology.   Pathogens and Bacteria are safely reduced through UVC radiation.   All Bitron UVCs come with inbuilt bypass capacity which allows adjustment of water flow over the UVC bulb.   A unique, integrated cleaning mechanism ensures permanent cleaning of the UVC quartz sleeve.   All these models include integrated magnets to protect the UVC and Filtration Pump from the build up of dangerous lime deposits.   Bitrons are designed to integrate seamlessly with Biotec flow through filters.
Birton UVC

Oase Bitron UVC

 

UVCs

Budget UVCs


Budget and Mid Range Ultra Violet Clarifiers
  Price Max. Pond
Volume

(litres)
Max. Flow
(litres/hour)
UV
Power

(Watts)
UVC-5 $210 4,500 3,000 5 W
UVC-9 $230 6,000 3,000 9 W
Vitronic 11 $219 10,000 1,700 11 W
Vitronic 18 $369 20,000 2,200 18 W
Vitronic 24 $439 20,000 2,200 18 W
Vitronic 36 $499 40,000 4,500 36 W
Vitronic 55 $599 60,000 6,500 55 W
 
So long as you remember to clean the inner quartz tube on a regular basis (and replace the UV lamp once a year) these budget priced and mid range units will help keep your pond water clean and clear.

The Mid Range Vitronic UVCs from Oase include a visual function check and a quick release mechanism,  simplifying the bulb change process and allowing easy cleaning of the quartz glass.


Oase Filtral Integrated Filtration systems
  Price Power
(Watts)
UV
Power
Max. Pond
Volume

(litres)
Filtral 2500 $399 20 Watts 7 Watts 2,500 litres
Filtral 5000 $549 35 Watts 11 Watts 5,000 litres
 
The Filtral is a compact, fully submersible filtration unit.   It incorporates an integrated mechanical/ biological filter,  UVC,  Fountain Pump & three fountain heads (Vulkan,  Lava & Magma).

Two different filter sponges together with bio-surface elements and filter pebbles ensure effective mechanical and biological cleaning.

There is only one power cable leading into the pond and no large filter system or hoses to impair the look of the pond.

Pond volumes are the maximum recommended for Australia, for near natural ponds with water plants but minimal fish stock.   OASE’s clear water guarantee  is included in this worry free package.

Filtral 5000 Filtral 5000
 

 
 Why is selecting a Filtration System so complicated?
When selecting a combination of Pump,  Filter and UVC to build your pond Filtration System,  it is important to recognise and understand the many factors which can influence your choice.

Issues such as climate,  exposure (ie is the pond in the shade or partial/full sun),  the level of fish stock,  depth of pond and the extent of planting in and around the pond all should be taken into account to ensure that the filtration system has the capacity to deal properly with the pollutants,  toxins,  debris,  algae and other pathogens which may otherwise accumulate and develop in the pond.

Even the plumbing design is important.   Use the largest diameter pipe available and avoid the use of  "Ts" and "elbows" wherever possible.   Small diameter pipe or tubing and T or Elbow fittings cause major reductions in water flow through a filtration system.   The best plumbing to employ is black,  ribbed,  flexible hose.   It doesn’t kink but does allow smooth changes of direction where necessary.

The maximum pond volumes listed above are a guide only .   They are generally based on the most favourable conditions,  including little or no fish stock.   At the other end of the scale (say,  relatively high fish stocks in a small,  exposed pond) the capacity of a pond suitable for treatment may be as little as 20% of the maximum volumes listed,  particularly in the case of some budget filters.

Another important point that should not be overlooked is the quality and functionality of the elements making up the filtration system.   Issues such as reliability,  longevity,  efficiency,  maintenance duty cycle,  ease of maintenance and overall effectiveness of individual products will all have an impact on the initial and ongoing costs associated with the purchase,  operation and maintenance of the filtration system.   As a general rule,  the higher the initial cost of a system the lower the ongoing costs and maintenance requirements.   Also,  the more effective the system will be at maintaining its functionality over the long term (say 5 to 10 years).

Ponds stocked with fish require extra attention.   It is important to ensure that the water temperature and pH of the pond do not fluctuate quickly nor do such fluctuations exceed the ranges suited to the fish.   Appropriate temperatures vary with fish species.   Make sure you get this information from you aquarium supplier when you purchase your fish stock.

Pond water pH must be maintained within the range 6.8 to 8.2 (and ideally held within the range 7.2 to 7.8).   The capacity of a pond to maintain a suitable pH balance is influenced by the hardness of the pond water - which should be at least 90 ppm (90 mg per litre) at all times.

Pond water test kits,  along with natural,  fish friendly products are available to deal with pH,  hardness and other water quality issues which can impact on the health of your pond.

Click here for more information about natural water care products


For optimum performance,  all Filtration Systems require four elements:
  1. An effective Filter to remove excess toxins,  sludge and debris from the pond.   Units incorporating both Biological and Mechanical Filtration are necessary to achieve this.
  2. An Ultra Violet Clarifier  -  to eliminate waterborne algae and pathogens and to help clump dead algae so they can be filtered from the water.
  3. A properly designed Filtration Pump,  capable of continuous (24 hrs/day) operation,  to circulate water and deliver pollutants and debris to the filter.
  4. A means of "Oxygenating" the pond water.   Adequate oxygenation of the water is necessary to keep pond dwellers healthy and to maintain the micro-organisms which produce biological filtration.


1.   Biological Filters perform the first of these tasks.   The extent to which they do this,  and their overall effectiveness,  depends upon their design.   In an ideal world:
  • Mechanical filtration will remove all unwanted debris (including bulky debris such as small twigs and leaves).   Only the better quality Gravity or Flow Through filters will achieve this effectively.
  • Biological filtration will convert toxic ammonia and ammonium,  via nitrite and then nitrate,  to harmless nitrogen gas.   Each of these processes requires a different set of conditions and bacteria type.   Multi zone filters are necessary to enable the complete conversion process to take place.
  • The filter will aid the oxygenation process.   Flow Through filters are designed to enrich water with oxygen as it flows through the filter.   Most simple gravity filters and all pressure filters do not aid this process to any great extent.

2.   Ultra Violet Clarifiers :
  • Must maintain translucent surfaces so the UV light can reach the algae and pathogens which it is to treat.
  • Water flow rates must be limited so that sufficient exposure time is achieved for the UVC to do its job.
  • The UV tubes must also be working at a reasonable level of efficiency.
To maintain translucent surfaces,  most UVCs require manual cleaning from time to time.   The more sophisticated units (such as Oase’s Bitron  "C"  series UVCs) have self cleaning mechanisms.   Such units also have inbuilt bypass capacity to ensure optimum water flow over a range of applications.

Because of limited operational life,  all UV tubes should be replaced every 12 months.   The optimum time to do this in Australia is mid to late Winter.


3.   Filtration Pumps should meet all of the following specifications:
  • Flow rate must be such as to turn over the full capacity of the pond every one to four hours (depending on fish stock levels) - possibly even more often for small,  shallow ponds with high fish stock levels.   When determining flow rate,  don’t forget to take account of losses within the plumbing;  Flow reduction due to any "Lift" required;  and the effect of the filters themselves (allow for a 20% reduction in flow rate due to the filter).
  • Pumps must be capable of passing solids to the filter.   To achieve this a filtration pump must be designed to allow solids to pass through without doing any damage.   This may appear to be self evident,  but most pumps are not designed in this way.   For safe,  reliable filtration systems use pumps designated by the manufacturer as filtration pumps or "dirty water" pumps (but not sump pumps as these are not designed for continuous operation).
  • To provide a constant supply of oxygen to the bacteria responsible for biological filtration,  filtration pumps must be reliable and designed to run continuously for a very long time.
  • Because they run continuously,  filtration pumps should also be highly efficient and require minimal maintenance to keep their operating costs down.
  • Finally,  filtration pumps should run silently.   The sound of a noisy pump can destroy the ambience of a peaceful pond setting.


4.   Often,  the need for adequate levels of  Oxygen in pond water is overlooked.   However,  oxygen is vital for the survival of fish and other water creatures.   It is also required to maintain micro-organisms in a Biological Filter.   Several options exist to achieve this:
  • Oxygenating plants growing in the pond
  • The use of a Flow Through filter
  • Including a water fall or stream in the water recirculation path
  • Adding a fountain to the pond