At Koi Water Garden, we are able to offer competitive prices on not only high quality koi, but also on koi related goods including ozone systems to provide the ultimate in water quality

last updated 18th July 2008

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

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The Aquaforte micro cells are 'space age' technology. They produce Ozone directly from water by electrolysis via a special 'space technology' reactor.  They are installed in line directly in the water flow from your pump directly back to the pond and are very low power units that consume a tiny 2 or 4 watts of power. The special micro cells require cleaning every two weeks to prevent fouling and replacement every 3 - 6 months depending on water conditions. These are small but ultra efficient devices which are ideal for quarantine tanks and will substantially improve water quality.

Ozone micro cell above.

40 mille gram/hour for ponds up to 400 gallons

80 mille gram/hour for ponds up to 800 gallons

Pack of Five replacement cells

The all new KoiOzone range of ozone generators are exclusive to Koi Water Garden Ltd and are manufactured to our specifications in the UK.  This is the first time that ANY UK  manufacturer has been able to offer a full range of ozone generators which have been especially developed with Koi ponds in mind to cater from the smallest, to the largest system.  These are robust and reliable corona discharge units that are easily serviced and maintained and are specifically designed for use in DRY ambient air or oxygen, and have very rugged cell designs to resist the effects of moisture ingress.  Smaller units feature optional on board air pumps to keep overall system costs down and ensure the correct metered air flow temperature and pressure through the units.  Larger models feature integrated oxygen generators and Redox control to maximise ozone output and increase efficiency, increase cell life and reduce service intervals. All of the units featured below can be fully automated  by incorporating  Redox monitor/controllers (see below). They represent fantastic value for money in terms of price/performance.

Specification

Above- Model Han, Ichi and Ni units from our all new KoiOzone range.

£395.00

£595.00

£695.00

£875.00

£975.00

£1595.00

£1795.00

£1995.00

£2295.00

Please note that the suitability of systems for pond sizes recommended above depends on stocking densities, organic load on the pond as well as other factors, including the Ozone reactor/Protein skimmer chosen.   Larger systems are available and built to order - please email for details.

We are delighted to launch, as part of our all new UK manufactured Ozone range of equipment, the first  commercially available Oxygen generators designed with aquatic applications in mind. We believe these are the first oxygen generators available anywhere in the EU commercially available from under £1100.00

Oxygen generators work by separating the air we breath into its constituent parts using molecular sieving technology.  Normal air is made up of only 20% oxygen, with the remainder being made up of Nitrogen, Carbon Dioxide and other trace gases.  When used in Ozone generators the normal air we use as a source of oxygen can lead to reduced ozone output, and excessive maintenance requirements since the Nitrogen in air can, in the presence of moisture, form Nitric acid which corrodes the inside of the cells used to produce the Ozone gas. Also as air comprises only 20% oxygen, for every 20 litres of air supply used as input, only 4 litres maximum of Oxygen is available for conversion to Ozone.

The inclusion of Oxygen generation will therefore increase Ozone output from any Ozone generator to which it is connected by a minimum of 200%, and normally much more than this, so a 1gm Ozone generator with oxygen can be much more efficient than a conventional 4gm system. Increased efficiency is delivered not only because the generators themselves can work at near 100% efficiency, but also because there is much less volume of gas being used. This means firstly that the smaller volume of gas, in this case Oxygen, is more efficiently converted to Ozone and secondly that the Ozone produced mixes much more efficiently in the Ozone reactors or skimmers employed, and there is less Ozone wastage.  Ozone reactors can therefore be smaller.  In addition to the increased efficiency, cell corrosion is minimised and service intervals increased, your Ozone generator will therefore perform as it should over a much longer period. Also, and particularly for larger systems, inclusion of an oxygen generator will reduce the overall cost of the system.

Our Oxygen generators can be used with virtually any make and model of Ozone generator on the market, not just our own, and we can guarantee that the efficiency of any system using Oxygen as a feed gas will be increased by a minimum of 200% and more probably by a factor of 400%.

3.0 litres/minute pure oxygen at 5 psi. Dimensions 52 x 36 x 36cm. Weight 18kg. Max power consumption 275 watts.

5.0 litres / minute pure oxygen at 5 psi. Dimensions 59 x 44 x 44cm. Weight 28kg.Max power consumption 350 watts.

Redox monitors are important with larger Ozone system installations to check the Redox potential of the pond water.  They are also useful to verify the readings obtained by automatic systems.  Redox controllers can be added to most Ozone generators to produce automatic systems which will control Ozone dosing via preset Redox levels.  The use of ozone systems requires the use of special ozone resistant materials. We stock special Teflon air line and ozone resistant ceramic air stones.

Koi Water Garden

Above:  Redox monitor/controller

Above: Redox dip meter

Above: Ultra fine bore ceramic airstones

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To get the best from any ozone system, the ozone produced must be mixed in the water flow efficiently.  Inefficient mixing can lead to excessive ozone wastage and an unwanted smell of ozone as well as a lower Redox level being attained.  Efficient mixing means that you will be able to use a smaller ozone generator, and therefore money spent on a good ozone reactor will reduce money spent on the generator!  Mixing can be achieved in several ways - small ozone generators can simply be attached to special ceramic air stone which are placed in a spare filter chamber or vessel placed at the end of the filter , so that ozone is able to treat the water passing through the filter system before it returns to the pond.  Air stones used in this way must be ozone resistant and fine bore ceramic material so that the bubbles produced are very fine - this will give an efficient mix and reduce ozone wastage.  A minimum chamber depth of at least 24" is to be recommended if this method of mixing is chosen.

Ozone venturi injectors are now available so that ozone can be drawn into a suitable return pipe and mixed with the returning flow on route to the pond. Venturi injection is an ideal method of ozone mixing for bead and all pressure filter installations, as the pumps required to run these filter systems are already powerful and therefore capable of running venturi mixing systems without further system modifications being required. Venturis are also relatively cheap to purchase and easy to install although because of the pump power required to use them, can be more expensive to run than other types of ozone reactors.

Ozone reactors are recommended for all gravity filter systems where the ozone generator produces more than 1gm per hour to ensure efficient mixing and reduce ozone wastage, our own model listed below can be fitted as an additional circuit within the filter system or on a skimmer circuit for example. These are not expensive to purchase and are economical to run as they only require small, low wattage pumps to produce the necessary water flow. They are not generally suitable for bead filter or pressure filter installations.

Special protein skimmers are also available which have been specially designed for use with ozone - these have the added advantage of skimming off unwanted proteins in the water as well as acting as ozone mixing vessels. Protein skimmers are widely used in commercial aquaculture and are available in sizes to suit any ozone installation. They are easy to install and economical to run, as again they only require low power pumps to provide good mixing. However, these devices are much more expensive to purchase than ozone reactors and the process of generating the protein skimming will compromise the ozone mixing to a degree so they generally need to be bigger than the equivalent ozone reactor to produce the same result - too much air passing through a skimmer will reduce mixing efficiency.

Below  list a range of ozone reactors, offering all the methods of achieving good ozone mix outlined here.

Ozone venturi injectors work by creating a negative pressure in the integrated air line connection and therefore ozone can be drawn into a suitable return pipe and mixed with the returning flow on route to the pond. Venturi injection is an ideal method of ozone mixing for bead and all pressure filter installations, as the pumps required to run these filter systems are already powerful and therefore capable of running venturi mixing systems without further system modifications being required. Features built in non return valve to avoid reverse gas flow.

Suitable for use with all KoiOzone ozone generators   Recommended  water injection rate 4000 litres / hour for both models.

We are now manufacturing not only our own range of ozone generators, but also our all new tailor made ozone reactor vessel which has been designed to maximise the efficiency of any ozone generator to which it is coupled. Standing 1.4m tall, featuring top entry and exit, this unit has been designed to sit in a filter chamber alongside your chosen filter. Water is pumped through the inlet and flow can be controlled by using the ball valve supplied. Water is forced to the bottom of the reaction chamber and on route is mixed with Ozone gas which is introduced via a special ceramic fine bore air stone at the bottom of the chamber.  Water then exits the unit after travelling back up to the 1.5" exit at the top of the unit. The design ensures maximum effective mixing of ozone and water to ensure that the ozone produced is able to mix with and disinfect the water passing through the chamber with minimal residual ozone gassing off to waste via the top mounted exhaust. The unit is manufactured from heavy weight pvc material throughout which is completely ozone resistant and very strong.

Suitable for use with all ozone generators up to 7gm using air as the input gas or 4gm using oxygen.  Max recommended flow rate 8000 litres / hour

These all new Sander Protein Skimmers have been specifically designed for optimum performance in Koi ponds and represent the ultimate in Ozone system efficiency. These are positive pressure systems, where Ozone is blown into the units under pressure via a suitable air pump and delivered to special air stones incorporated into the units  Valves control the air input volume and the foam level in the reactor, to ensure optimum mixing of Ozone and water. They also incorporate waste air outlets so that any residual Ozone can be safely vented to atmosphere. Suitable for use with all generators. Whilst relatively expensive compared to other protein skimmers listed, these are more sophisticated technology and such is the efficiency of these units that much smaller Ozone generators can be specified, and an Ozone requirement of 200mg / 1000 gallons will still provide superb results, as very little of the Ozone produced is wasted

You can see from the photos the 'blue' tinge to the water in the skimmer and the mass of bubbles produced in fresh water.

The skimmer is powered by an Oase Aquamax 8000 pump for water supply and a Secoh 80 air pump to provide the necessary volume of air required.

The close up top left clearly shows the mass of foam being produced, even in these superb water conditions.

The picture bottom left shows the results, the water quality (not just clarity) is superb. The Tancho in the centre of the picture is swimming 6ft down!

Sander skimmers are simple to install and to maintain and are undoubtedly one of the best ranges of freshwater protein skimmers available today.

All about Ozone 

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