Oase Pressurised Filter Systems: Pond volumes with raised filter outlet
Pond Turnover Rates: The pond stocking levels will determine the required turnover rate which in turn determines the required pump flow rate. Typically, an ornamental pond without any fish will require the pond volume to be circulated at least once every 6 hours; an average stocked pond (with up to 1 kg of fish for every 1000 litres) will require circulating once every 4 hours; a heavily stocked pond including Koi (with up to 3 kg of fish for every 1000 litres) will require circulating once every 2 hours.
Effect of raising the filter outlet: Raising a gravity outlet, typically for a watercourse or waterfall, will reduce the flow rate from the pump thereby increasing the amount of time it takes to circulate the dirty pond water through the filter. This effectively reduces the maximum pond volume that the filter system can cope with and the resultant reduction in pond volumes are stated in the charts below.
Pump Flow Rate: The pump flow rate (typically in litres per hour lph or litres per minute lpm) is determined by the vertical lift, in metres, from the surface of the pond to the outlet pipe AND by the friction losses through the system. The narrower the pipe bore the higher the friction losses, so always use the maximum hose diameter.  There will also be a friction loss caused across the filter media (foams etc). 
The importance of regular maintenance (cleaning): High flow rate = effective filtering. As the filter media (e.g. foams) remove dirt and waste from the pond, so the friction loss across the foams will increase, thereby reducing the flow rate and the effective performance of the filter. It is therefore essential, especially for those systems with a raised outlet, to keep the filter foams clean. Fortunately, this is extremely easy with Oase pond filters.  

 

All sets include BioPress Pressurised Filter, Integral UVC and Aquamax Pump. Hose can be ordered from our Accessories page
Filter Set Part Number Filter Model Ultraviolet Clarifier  Pump Model Height of filter outlet above the pond water surface Pond volume in litres
No Fish Average Fish Stock 1kg/1000 litres Koi/High Fish Stock 3kg/1000 litre
Biopress 12000 Set
56968
Biopress 12000
11 watts
Aquamax 5500
50 cm
12000
6000
Not Suitable

 

All sets include Filtoclear Pressurised Filter, Integral UVC and Aquamax Eco Pump. Hose can be ordered from our Accessories page
Filter Set Part Number Filter Model Ultraviolet Clarifier  Pump Model Height of filter outlet above the pond water surface Pond volume in litres
No Fish Average Fish Stock 1kg/1000 litres Koi/High Fish Stock 3kg/1000 litre
Filtoclear SET 1A
56396
Filtoclear 3000
9 watts
Aquamax Eco 2000
50 cm
1500
750
N/A
Filtoclear SET 1
56968
Filtoclear 3000
9 watts
Aquamax Eco 4000
50 cm
3000
1500
N/A
Filtoclear SET 2
56969
Filtoclear 6000
9 watts
Aquamax Eco 6000
50 cm
5500
2500
1250
Filtoclear SET 2
56969
Filtoclear 6000
9 watts
Aquamax Eco 6000
1 metre
2000
1000
N/A
Filtoclear SET 3
56970
Filtoclear 11000
11 watts
Aquamax Eco 8000
50 cm
9000
4000
2000
Filtoclear SET 3
56970
Filtoclear 11000
11 watts
Aquamax Eco 8000
1 metre
3000
1500
N/A
Filtoclear SET 4
56828
Filtoclear 15000
11 watts
Aquamax Eco 12000
50 cm
13000
7000
3500
Filtoclear SET 4
56828
Filtoclear 15000
11 watts
Aquamax Eco 12000
1 metre
6000
3000
1500
Filtoclear SET 4
56828
Filtoclear 15000
11 watts
Aquamax Eco 12000
1.5 metre
2000
1000
N/A
Filtoclear SET 4A
56828A
Filtoclear 15000
11 watts
Aquamax Eco 16000
50 cm
16000
8000
4000
Filtoclear SET 4A
56828A
Filtoclear 15000
11 watts
Aquamax Eco 16000
1 metre
8000
4000
2000
Filtoclear SET 4A
56828A
Filtoclear 15000
11 watts
Aquamax Eco 16000
1.5 metre
4000
2000
1000