What size filter, uv and Pump  do I need for my pond ?

 

Before you purchase a pond filter with UV

What Type Of Filter do I Want

Gravity Filter System with Fountain	Pressure Filter without fountain.
With the gravity system the filter has to go either above the waterfall or at the side of the pond.	With the Pressure Filter System the filter can be placed almost anywhere ( buried up to lid, in garage, shed, greenhouse etc)  as the water is pressurised going back to the pond.

Pond Filters need cleaning out regularly depending on how many fish, how heavy you feed etc. Another big difference between these two types of filters is the way you clean them. With the  gravity filters you have to take out the sponges and rinse them out ( preferably in pond water so that tap water chlorine does not harm the bacteria in the sponges). With the Pressure filters, most have them have a third outlet on the top for back flushing. The operation therefore consists of turning the knob on the top of the filter to cleanse and the water goes through the filter backwards and comes out of the spare nozzle that you have connected an extra hose to. You then water (and feed) the garden and clean the filter at the same time. This of course empties some water out of the pond. You therefore have to refill with tap water (either treated) or if you spray the water through the air slowly onto the surface most of the harmful chlorine will be dissipated. This is a good thing and should be done once per month in order to maintain the PH ( alkalinity) of the pond. If you don't do these partial water changes the pond will go acidic This should be checked anyway once per month with a pond test kit.

How Big Should My Filter Be
You must first understand that you should have at least double the amount of filtration than actual pond water. This is because although the filter might say that it will work on a pond (lets say) 3000 Litres,  if you pond was 3000 then the 3000 Litre Filter would be struggling  working flat out to keep it clean. Most Pond manufacturers quote the maximum size of pond that their filter will do. Mostly they quote a pond with not much sunlight and not many fish. You can never over filter a pond - so make sure the filter you choose is adequate. If you intend to have a highly stocked Koi pond then you should aim to have a filter to cope with two to three times the capacity than the pond really is.
Ultra Violets. Most of the filters on the website have built in ultra violet sterilisers ( UVS) and these are correct for the size of filter they are fitted to.

What Size Pump.
The rule of thumb is that all the water in the pond should go through the filter in at least two hours. However with ponds 2000 litres or smaller 1200 to 1500 litres per hour pumps should be the minimum as pumps smaller will only do a fountain.

To have a look at some filters that have already been paired up with the correct size pump. CLICK HERE

 

To calculate the capacity of your pond, enter the AVERAGE measurement in the boxes below.

Please enter FEET for GALLONS or CM for LITRES.

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