Air pumps and related equipment

At Koi Water Garden, we are able to offer competitive prices on not only high quality koi, but also on koi related goods such as pumps, filters and other accessories.

last updated 30th November 2007

 

Contact us

Koi Water Garden Logo

The Old Rectory, Risborough Rd
Gt Kimble, Nr Aylesbury
Bucks   HP17 0XS
Phone/Fax 01844 342390

 

 

Unless otherwise stated all dry goods listed below can be supplied by mail order .  Stock items are normally despatched within 3 days of receipt of order.  Please note there is a minimum order charge for dry goods of £10.00  net of carriage - we regret we are unable to process smaller orders by post/credit card.

** Please note our normal opening Hours - Thursday to Saturday  9.30am - 5.00pm. Sunday 9.30am to 12.30pm. -  Monday to Wednesdays inclusive closed - visiting by appointment only.**

Shop online with confidence via our secure on-line shop. We  accept all major credit cards! - see What's new for details.
 

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Carriage is free on most dry goods orders of £100 or more to most mainland UK postcodes. Free delivery applies to order of over £100 that can be packed in one box of under 25kgs - Note that second and subsequent boxes will be charged at the normal rates - we will confirm carriage charges to be levied before we ship.

Please note that calculated carriage charges apply to deliveries to England, Wales and parts of Scotland.  For deliveries to Scottish Highlands, Ireland  and Islands please see our dry goods delivery charges page or contact us for a carriage quotation

 

Why do we need air in our koi ponds?

An adequate Oxygen supply is vital for the health of our koi.  All forms of life need and consume oxygen.  This is the same in  our koi ponds and plants (including all forms of algae) , organic life and of course our koi consume oxygen.  Koi are rather special in that they need a considerable supply of oxygen in the water for their survival and well being.

In fact they need a minimum of 6mg/litre of oxygen dissolved in the pond water.  .Our filter bacteria (and in fact all aerobic bacteria) also consume prolific amounts of oxygen which they use to oxidise Ammonia and convert this into Nitrite and then convert Nitrite into Nitrate. Filters  will not work properly without an adequate oxygen supply within the media.

Decaying organic matter also uses oxygen as it is converted into waste and the 'dirtier' the pond,  the higher the requirement for oxygen.
 

Plant life consumes oxygen during the night and gives off carbon dioxide.  This process is reversed during the day.  The more organic load on the pond (fish, plants, decaying material) the higher the biological oxygen demand (BOD) Every life form is therefore competing for oxygen.

Cold water can hold considerable amounts of dissolved oxygen.  Unfortunately, during warm weather, the ability of water to hold dissolved oxygen is substantially reduced and during warm muggy, thundery days in summer, there is a real threat to the health of our koi,  especially overnight, when plant life can quickly strip the already low levels of oxygen from the water with fatal results for our koi.

It is therefore vital to top up our dissolved oxygen supply to ensure the health of our koi and to ensure our filters continue to operate correctly. Oxygen can be supplied by waterfalls, venturis and air pumps.  Waterfalls are extremely efficient at providing good aeration,  but many ponds just don't have them, and even where present, many people turn them off at night, just when they are needed most.  Venturis are extremely inefficient devices, only work near the surface and use a considerable amount of pump power to run, thus making the pond water pump work harder than it needs to in order to deliver the correct amount of water.

Without doubt air pumps are the most efficient and cost effective way of providing adequate aeration to your koi systems and we are pleased to be able to offer the best air pumps available today from the Secoh range.

   

 

Secoh Air Pumps - Lower prices for 2005 and now with 2 year warranty

Secoh Air pumps are made in Japan and are of excellent quality, represent real value for money and will give years of trouble free service. Waterproof and very quiet and proven to be the most powerful air pumps available today.  For example the Secoh 100 actually produces 145 litres / minute of air, and the 40 produces 60 litres of air/minute.  Has won 'best pump' in just about every independent review of air pumps to date!  Prices for 2005 models now lower than ever.

All models are supplied with an appropriate manifold, 3way, 6 way, 12 way or large bore 2 way.. Now Secoh pumps come with a 2 year warranty

Model Output Price   Secoh air pump

Above: Secoh SLL 40 air pump

Above: Pressure relief valve

air manifolds

Above: A range o air supply manifolds

Above: single air tap with 6-8mm hose tail

Above: brass  non return valve 6-8mm

Above: 6-8mm airline connectors

P 20 20 litres/min supplied with 2 way manifold £79.00

SLL 40 40 litres/min supplied with 6 way manifolds £120.00

SLL 60 60 litres/min supplied with 6 way manifold £165.00

EL 80 80 litres/min supplied with 12 way, or 2 way large bore manifold (please specify when ordering) £205.00

EL 100 100 litres/min supplied with 12 way, or 2 way large bore manifold (please specify when ordering) £225.00

SLL models Spare Diaphragm set £18.00

EL Models Spare Diaphragm set £24.50

Pressure gauge and pressure relief valve.
Recommended for larger air pumps, where back pressure created by insufficient bore air piping or too few outlets being used can quickly damage the pump diaphragms.
Pressure gauge. Fits in line to the manifold, to provide a simple visual check of supply pressure .

£25.00


Pressure relief valve.  Fits in line to the manifold, and operates automatically when too much pressure is detected.

£28.00


Air supply manifolds (4mm).

6 Way for standard 4mm airline with on/off air taps £12.50

12 Way for standard 4mm airline with on/off air taps £19.50

Air supply manifolds
(6 - 9mm).
2 Way  taps for 3/8th"  (9mm) airline £15.50

single air tap with 6 - 8mm hose tail and flexible connector for direct connection to air pump £10.50

3 Way ( 2 x taps for 3/8th" or 9mm air line ) plus 12mm (1/2") extension to allow addition of further manifolds £19.50

Non return valves. Non return valve for 4mm airlines (prevents water syphoning back down airline). Plastic £1.10

Non return valve for 6 - 8mm airlines (prevents water syphoning back down airline). Brass bodied with stainless steel hose tails. £5.95

Airline connectors 6 - 8mm Airline connectors - straight. Plastic £1.00

6mm Airline connectors - "T" . Plastic £1.50

Rubber Manifold 12mm Rubber manifold for connecting air pumps to air distribution manifolds. Complete with clips  £3.95

 

For all air pumps over 60 litres per minute it very important to use all the air capacity available by using all the taps on the manifolds supplied, or leaving taps open when not used to ensure that back pressure is reduced.  All air pumps are generally designed to run at a maximum pressure of 1/4 bar,  and exceeding this pressure can cause premature diaphragm failure (or piston wear in the case of piston pumps).  Many air stones will gradually clog in use and should be changed annually.  Pressure gauges and pressure relief valves are therefore designed to protect your pump against possible damage and will indicate when air stones need changing or when airline restrictions cause too much back pressure to be present.

 

 

Silicon Airline

4mm (Per metre) 25 p

air line

100 metre roll £19.50

PVC hose (clear or green supplied)

6mm airline (per metre). Use for large tube, full can and round disc air stones. 40p

  3/8th inch (9mm) (per metre). Use for Nexus air connections 50p

  1/2 inch (Per metre) 60p

  3/4 inch (Per metre) suits air pump manifolds 95p

  1 inch (Per metre) £1.50

 

 

Half and full can Air stones. 50mm x 50mm baked (4mm connection) £1.75

air stones

 

100mm x 50mm baked  (6mm connection) £3.50

Ceramic air stones.
Ceramic air stones do not block easily, last for years and are worth the extra investment, especially if changing air stones is time consuming
120mm x 22mm (4 or 6mm connection) £5.50

150mm x 27mm (4 or 6mm connection) £6.75

20cm round disc.
(6mm connection)
£24.50

 

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