Tools
Practical things for keeping koi, built around the questions we get asked most. More will land here over time.
Heavy metal checker
Account neededEnter the metal figures from your water company's report or a lab test of your own water, and see if any come back over the safe limit for koi.
Pond volume calculator
Work out roughly how much water your pond holds, in litres or gallons — rectangular, round or oval.
Salt dose calculator
Work out how much salt it takes to bring a pond to the concentration you are aiming for, allowing for whatever is already in there.