Top quality hand selected
Japanese Koi Carp at sensible prices

Dormer Cottage, Spurgrove Lane, Little Frieth,

Nr. Henley on Thames, Bucks, RG9 6NU

Phone/Fax: 01494 882600

Order Hotline: 07814 011357

Testing and monitoring equipment

At Koi Water Garden, we are able to offer competitive prices on not only high quality koi, but also on koi related goods including test kits and digital test instruments to help keep your Koi's environment in tip top condition.


last updated 25th October 2023

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Seneye Pond


Ever found you have lost a Koi but didn’t know why? Have your had a pond leak, but found out too late? Seneye Pond makes it easy for you to monitor your pond and protect your fish. The seneye can guard fish from the devastating effects of ammonia poisoning, as well as harmful swings in pH and temperature. The Intelligent software automatically monitors the pond day and night, alerting the you before there is a problem — the ultimate in stress-free fish keeping. As the seneye devices are USB there are multiple connection options available. Place the seneye directly in a filter or float it in a pond. Use the Active Extension accessory and increase the cable length to a massive 17.5m. Or go WiFi from the start so you can monitor your pond condition remotely. The seneye Pond is suitable for any sized pond. Ideal for customers, who want to continually monitor the water in their pond and dont want to undertake timeconsuming manual testing. :


  • Seneye automatically tests multiple life critical parameters.
  • Compatible with any sized pond
  • Easy to install, simply float in your pond or place inside filter
  • Constantly watching, alerts you before there is a problem
  • Get alerts however you want; flashing lights, e-mail, SMS*
  • Upload results to Internet and get straightforward advice*
  • USB connection with multiple connection options, including optional USB power adaptor
*Ammonia and pH monitoring require seneye+. Seneye + is a disposible test slide which lasts for 30 days and allows the monitoring of the pH and Ammonia parameters


Requirements for Seneye Pond:
  • Windows PC with a wired or wireless network and TCP/IP protocol, Windows XP, Vista 32-/64-bit, Windows 7 32-/64bit.
  • Full speed USB 1.0 port
  • Minimum 1Ghz processor and 128mb RAM
  • Internet Browser: Internet Explorer 9.0+, Firefox 4.0+, Safari 4.0+
  • Download of seneye connect application required from

    If you upgrade to the Seneye WiFi pack then the seneye web server with WiFi module removes the need for a pc altogether and allows wireless connection from your seneye device to your router / modem. The data uploads will be automatic which will make them faster and more stable, there are also a few additional alerts such as power (or lost connection) monitoring. The seneye web server will upload the data from your seneye pond device without the need for a pc. You will then be able to view all your readings from a computer (pc/mac), tablet or smart phone from anywhere in the world via the seneye cloud.


Seneye will constantly monitor:-

  • Temperature : Constantly monitors water temperature, so you can get an alert if your heater breaks
  • Free Ammonia: Monitors the highly toxic free ammonia (NH3) at very low levels, so you can stop your fish from dying from Ammonia posioning.
  • pH monitoring: The seneye monitors pH in your pond water between 6.4 and 9. This range is ideal for most aquatic life and by monitoring this range increased accuracy has be achieved.
  • Water level: Water Level readings are only taken when the seneye device is in water, no false readings.
Specification Price
Seneye WiFi Pond - includes router for remote connectivity. £279.95
Seneye Pond - 3 months supply for Ammonia and pH monitoring £24.50
Seneye Pond - slide bundle - 6 months supply for Ammonia and pH monitoring £44.00
Seneye USB extender 2.5m £9.95

Above: Seneye Pond monitoring pack

Above: Seneye + test strips for Ammonia and pH tests


Above: Seneye WiFi router

Above: USB extension cable


Exact iDip Digital Photometer


The latest technology in digital water testing allows customers to transfer their water testing results straight to an iPhone or Android device using a personalised app. From there they can be stored, emailed and categorised by location or customers.


Ideal for customers, who want to test the water in their Pond and: Do a lot of regular testing and want to record the test results - and - want to keep the results in a chart - The iDip® photometer will test your water and download the results for you Results include date, time and location - saving repetitive data entries. The new eXact iDip® photometer harnesses the power of smart devices and the simplicity of design to efficiently handle regular and complex water testing. The smart phone app is designed to work seamlessly with the waterproofed handheld unit with parameter information, data storage and GPS tracking included. Results are quickly available and exact. The eXact iDip® photometer is manufactured using the highest quality standards, capable of running over 35 water quality tests, uses simple AAA batteries.


Our iDip® Starter Kit comes with reagents to test water for Ammonia, Nitrite, pH , Nitrate, Total Alkalinity, Total Hardness, Free and Total Chlorine and Phosphate. Further tests can be downloaded instantly within the app. For the full list of tests currently available, please see the list below. We are also offering the iDip system photomer with no tests, so you can choose your own - see below. New tests are constantly developed - making this a testing device which can grow with your needs and requirements. It also makes it very efficient, as the user only pays for what he actually uses.

This eXact® iDip® is the first product in the pool water testing market to provide complete wireless connectivity between any Anddroid, iPhone®, iPad®, and iPod Touch® and a photometric device. Data is seamlessly transferred between the two devices when paired with the eXact iDip® photometer using Bluetooth® wireless technology that syncs and transmits test results in real time. The application stores the test results history of multiple water sources. Data can be shared via email and the built-in GPS feature allows for easy retrieval of water testing locations.


Exact iDip Digital Photometer


The Exact iDip starter system comes complete with:-


  • pH test 6.0.- 8.5 (100 tests)
  • Ammonia 0.1 - 12 ppm (25 tests)
  • Nitrite 0.07 - 16ppm (50 tests)
  • Nitrate 0.02 - 3.8ppm (50 tests)
  • Phosphate 0.02 - 3.8ppm (50 tests)
  • KH (calcium hardness) 12 - 200ppm (0 - 12 DH) (100 tests)
  • GH (Total Hardness) 60 - 600 ppm (3 - 22 DH) (50 tests)


Other parameters available for measurement include:- Salt, Copper, Ozone, Manganese, Hydrogen Peroxide, Chromium and Iron.


Compatible with: Apple iPad (3rd gen, 4th gen and Air) Apple iPad Mini (1st gen and Retina) Apple iPhone (4S, 5, 5C and 5S) Apple iPod touch (5th gen) Android®


iDip® photometer uses Bluetooth® wireless technology that syncs and transmits test results in real time. The application stores the test results history of multiple water sources. Data can be shared via email and the built-in GPS feature allows for easy retrieval of water testing locations.

Specification Price
Exact iDip starter system complete with tests strips £395.95
Ammonia Test refill £17.95
Nitrite Test refill £16.95
pH Test refill £11.95
Nitrate Test refill £17.95
Phosphate Test refill £17.95
Calcium Hardness (KH) Test refill £18.95
Total Hardness (GH) Test refill £15.95
Free Chlorine Test refill £12.95
Total Chlorine Test refill £13.95
Copper Test refill £13.95
Salinity Test refill £17.95
Bacteria count Test refill £18.95



Japanese Floating Thermometer


This super floating thermometer reads in Centigrade and is accurate - its made specifically for Koi ponds in Japan - not swimming pools!




Model Price
Japanese Floating £13.95



IR Infra Red Pocket Thermometer


This super little pocket thermometer reads remotely by using Infra Red technology - just point at the water and press the button to get an accurate and instant reading of water temperature. No probe, no wires, no contact with the water. Powered by 2 x AAA batteries, the unit utilises an LCD display which reads from -50 and + 350 deg C, with a resolution of 0.1 deg C - the unit comes complete with batteries. Reads in Celsius or Fahrenheit.


Model Price
IR Pocket £29.95

Koi Medic Pro Multi tester


Koi Medic have introduced a super new model into their range of dip meters for pond water testing. The new Pro Multi tester measures pH, temperature and salinity levels all in one simple to use instrument. The unit features a dual LCD display, measures temperature in deg C or F, salinity in % or ppt and is illuminated for clearer display. It also features autoshut off and of course is water resistant. The sensor can also be replaced if required.


Key Features:-

  •  1 key simple operation
  •  4 x AA Batteries included
  •  Easy push button calibration
  •  Automatic temperature compensation
  •  Economical replacable 3 in one sensor
  •  Automatic end point sensing and lock
  •  Auto-off function to save power
  •  pH range 0 - 14.0
  •  Temperature range 0 - 57 deg C
  •  Salinity 0 - 1.00
  •  Dimensions; 36mm diameter, 415mm length
  •  Weight; 300gm with batteries
Model Price
Koi Medic Pro £139.95





The Binocular model is recommended for people who require the performance of a professional microscope at a very realistic price. It has a 6volt, 20 watt quartz halogen illumination with rheostat control for optimum illumination. The field lens has integral daylight blue filtration. Like our monocular models, it comes with a mechanical stage and vernier for fine slide adjustment. Specification includes x 10 wide field eyepieces and x 4, x 10, and x100 achromatic objectives with numerical apertures of 0.1,0.25,0.65 and 1.25 respectively.


 These professional microscopes come complete with carrying case and starter pack of slides. They have a range of 3 magnifications to suit all requirements. The Monocular comes with its own mechanical stage and slide holder to provide the necessary fine adjustment to slide movement and also comes complete with its own aluminium case. Magnification range x 50 - x 800. Also now features inbuilt lamp for specimen illumination. As if that's not enough you also get a fish parasite identification kit thrown in! The identification Kit contains: slides, cover slips, mountants, stains, specimen tubes, gill swabs, skin scrapers, pipettes and step by step instructions. No previous experience of microscope use or slide preparation required. Both units utilise spring loaded front lenses and have both coarse and fine adjustment for optimum focus.

 We also now offer a mini digital video camera that fits into the viewing eyepiece of any of our microscopes, whether monocular or binocular. The minicam is connected directly to an external USB port of any PC or Laptop operating Windows 98 (second edition) and above - N.B. not suitable for Windows 95 or 3.1. The cameras come complete with software, transformer and USB connection lead. The minicam offers high resolution with an image size of 583 x 438 pixels that is TWAIN compliant and can be imported directly into any image processing software. Watch those nasty little parasites on your PC screen live!



Monocular Microscope Kit


This super new microscope has all the features as standard that you would normally only find on much more expensive microscopes. It has objectives x 4, x 10 x 40 and x 100. The eyepiece is x 10 which means this unit can magnify up to 1000 times with the x 10 eyepiece which is enough to clearly identify not only ALL cold water parasites, but many bacteria strains as well. It is also equipped with a mechanical stage with slide clips for fine sample movement. Full sub stage condenser and iris. Inbuilt rheostat controlled sample illumination built in. (Spare bulb included) It also has spring loaded lenses to prevent lens damage on contact with the sample platform. As an option there is a beautiful aluminium carrying case to complete the kit. Also included as standard is a fish disease diagnostic kit (see below for details). Fantastic value for money and we think the best available anywhere in the market at present.  


Binocular Microscope Kit 


Binocular microscope with inbuilt illumination. Objectives x4,x10,x40 & x100(oil). Eyepieces x10 wide field. Mechanical stage with condenser and iris. 


Minicam Camera Kit 


A miniature CCTV camera system that links directly to a PC or laptop via a USB port. Software provided. on Mini CD. High resolution version 583 x 438 pixels. Not suitable for use with TV monitors. Simply replaces existing eyepiece. Software enables real time viewing of specimen and still shot capture to record image on your PC. 


Parasite Identification Kit 


Identification Kit contains: slides, coverslips, mountants, stains, specimen tubes, gill swabs, skin scrapers, pipettes and step by step instructions. No previous experience of microscope use or slide preparation required.

Model Price

Carrying Case


Minicam cctv Camera

Parasite Identification Kit

Microscope Slides


 Monocular microscope
Binocular Microscope kit
Minicam Camera Kit

 Above: Minicam miniature cctv Camera

Digital Water Quality Testing system


At last, we are able to offer our customers a truly professional water testing system.


The Palintest portable photometer system is a sophisticated and very accurate device which enables the koi keeper to precisely monitor the condition of the pond water.


The instrument uses digital colourimetry, long recognised as the most accurate method of determining the levels of many common and some not so common substances that may be present in pond or fresh water supplies.


Digital colourimetry is the method used by water companies up and down the country to accurately monitor water conditions and this technology has now been incorporated into a range of portable instruments.


But not only is this instrument extremely accurate, as it utilises a number of different light wavelengths , it can monitor up to 37 different water parameters, including aluminium, copper, zinc, phenols, chlorine, Chloramine, and phosphate as well as the basic necessities of ammonia, nitrite and pH. 37 different tests performed by one instrument, and it does not matter if your pond water is cloudy, green or contains medications, since the instrument calibrates every test sample against your pond water first. No more visual interpretation of colour - no possibility for errors.


The new 7100 photometer now automatically selects the correct wavelength and displays the results in mg/l directly on the large LCD display.


To demonstrate the accuracy of this unit, it can measure ammonia levels in water down to 0.01 mg/litre, and it will register the presence of this and many other pollutants whilst a normal test kit tells you the water is safe.


Without doubt the most accurate and flexible water testing system available to the koi keeper anywhere! A bold claim - but one which is easy to demonstrate.


We all invest considerable sums in our koi, and we all know that the most important single factor in keeping our koi healthy is water quality. Now for the first time, koi keepers everywhere can accurately and precisely monitor virtually all of the important water parameters which really matter.


This instrument could be the best investment in the koi hobby you could ever make.


Price includes next day delivery.


Test your tap water, we know you won't be surprised at what you find - but, test the output from your cartridge water purifier - we think you might be surprised at what you find - whatever the claims!


Digital Photometer £1429.50


Reagents for the Digital Photometer Tests are Here


 Digital photometer water testing system


The system comprises a digital photometer, six glass test tubes and dilution tube in a moulded plastic carrying case and comes complete with an extensive operating manual explaining the technology, test methodology for each chosen parameter and detailed instructions for each test. Reagents sold separately




Direct reading colourimeter with automatic set-up and reading


Operating wavelengths 450nm, 500nm, 550nm, 575nm, 600nm and 650nm.


Large backlit graphic LCD display


Resolution 0.001 AU


Accuracy +/- 0.5% at 4% Transmittance


Display in Five languages (French, German, Spanish, English and Italian)


Power 3 x 1.5v AA Batteries (included). Automatic power off.


Size: Instrument only W146 x D275 x H75mm


Weight: Instrument only 975gm


Rated IP 67 Waterproof


Digital water testing system








Digital Salt Meter


Ensure the accuracy of salt treatments and top ups, even after water changes. Reading 0 - 1% Accurate to 0.01%



Model Price
Digital Salt Meter £79.50
 Digital Salt Meter

Digital pH Meter


Ensure the accurate measurement of pH with this accurate and simple to use pocket pH meter. Complete with calibration standard.



Model Price
Digital pH Meter £59.50
 Digital pH meter

Electronic precision Balance


Ensure the accuracy of each dosage of medication - too little will be ineffective, too much could damage your koi and filtration systems.

 Range 0-500gm, resolution 0.1 gm. Compact size with Tare, and calibration weights.

 Flip off lid to protect the balance when not in use, this also acts as an additional and larger weighing platform.

  •  2 key simple operation
  •  3 Lithium Batteries included
  •  Digital auto calibration
  •  500 Gram Capacity
  •  accurate to 0.1 gram
  •  Incredibly durable
  •  Battery power or from USB cable (supplied)
  •  Heavy-duty hard case
  •  Auto-off function to save power
  •  Reads in Grams, Ounces, Pennyweight & Troy Ounces
  •  Large weighing area - included cover also acts as a large expansion bowl / tray
  •  Dimensions 6" x 4" ( 15cm x 10cm)



Model Price
Digital Pocket Balance £39.00
 Electronic precison gramme balance

Pocket Test Kits


Liquid test kits - sufficient for at least 30 tests. These are NT Labs and Columbo pocket test kits, offering good accuracy and give consistent results




Test Price
Ammonia £13.50
Nitrite £9.50
Nitrate £9.50
pH £8.50
KH Carbonate hardness £9.50
GH General hardness £9.50
 Water Quality test Kits

Multi Parameter Test Kit


This super multi parameter test kit from the Columbo range includes tests for Ammonia, Nitrite, Nitrate, pH, KH (carbonate Hardness) GH (General Hardness) and Phosphate. Refills are available for all tests. Kit supplied in a hard carry case for safe transport and is complete with sample tubes, reagents and full instructions.



Model Price
Columbo Multi Parameter Test Kit £44.50
 Colombo Multi parameter test kit

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