Testing your pond water is an essential part of pond keeping and should be part of your regular maintenance regime, however it is often over looked. Regular testing of key parameters like pH, Ammonia, Nitrite and Nitrate will ensure that potential problems are identified and dealt with before becoming a major problem. A19 Koi & Pond Supplies stock a variety of reliable and accurate test kits from brands like Kusuri, Colombo and NT Labs. Once identified, we have a range of pond treatments available to help you get things back in balance and maintain a healthy pond and happy fish.