For more detailed information on water quality and the chemical compounds tested for in a koi pond, read our article 'Koi: A Beginners Guide'.
Ammonia is the most toxic pollutant involved in the nitrogen cycle, and should be tested for weekly.
Nitrite can be lethal at high levels over a long period of time, and should be tested alongside ammonia.
The pH of the water should be known at all times, as the acidity of the pond can affect other test readings and the health of the koi and filter bacteria colonies.
N.T. Labs test kits are easy to use, however the Kusuri offer a better level of accuracy. N.T. Labs are a liquid based test kit, whereas Kusuri have opted for a tablet based kit.
Refills are available for the Kusuri test kits.
The more advanced hobbyists may choose to use the Hanna range of test kits. These are electronic kits based on the measurement of light. They offer unrivaled accuracy, measuring to 0.01 mg/l.

Seneye USB Home Solution
Our Price: £59.00

Seneye USB Pond Solution
Our Price: £89.00

Seneye USB Reef Solution
Our Price: £99.00