PondCare® Master Liquid Test Kit

Master Liquid Test Kit


  • Easy-to-use pond test kit for early detection and early correction
  • Test 4 of the most important pond water parameters
  • EZ-read results cards and instructions included for convenient testing of pond water

Complete system for testing both tap and pond water.  Contains four essential tests to protect fish from dangerous water conditions. T ests include: pH, ammonia, nitrite, and phosphate. Each kit contains an instruction book, improved color cards for easier reading of test results, four test tubes and a holding tray.

Why Test for pH?

pH is the measure of acidity or alkalinity in water. A pH reading of 7.0 is neutral, a pH higher than 7.0 is alkaline and a pH lower than 7.0 is acidic. A healthy pond depends on proper pH balance. Many factors can significantly alter pond water pH, creating an unhealthy environment for pond life. Acid rain, minerals leaching from soil or rain runoff, decomposing plants and animal waste can all contribute to unstable pH levels in the pond.

A pH of 7.0 is considered ideal for plants and fish in the pond. Some species of pond plants, such as water lilies and water hyacinths thrive in slightly acidic water below 7.0. Pond fish prefer an alkaline pH above 7.0. Therefore, an acceptable pH range is between 6.8 and 7.6.

Why Test for Ammonia?

Ammonia is a toxic waste excreted into the pond by fish, birds, and other pond life. The natural process that controls ammonia in the pond is called the biological filter. The biological filter is comprised of nitrifying bacteria that use ammonia as a food source to grow and reproduce. The nitrifying bacteria convert ammonia to nitrite (also toxic), which in turn is converted into non-toxic nitrate. A healthy pond has no detectable ammonia.

Newly set up ponds need time to develop the biological filter. Until sufficient numbers of nitrifying bacteria grow in the pond, ammonia will be detected. Overstocking the pond with fish, uneaten fish food, and decomposing vegetation can cause excessive ammonia. Ammonia is highly toxic to all pond life.

Why Test for Nitrite?

Fish, frogs, birds, and other pond animals release solid waste into the pond water. This waste is turned into toxic ammonia. Nitrifying bacteria in the pond convert toxic ammonia to nitrite (also toxic). Nitrite is then converted to nitrate.

Newly set up ponds have not developed sufficient nitrifying bacteria to detoxify ammonia and nitrite. Ammonia and nitrite will accumulate when the pond is initially set up, especially if fish are added. Overstocking with pond fish, as well as excessive uneaten food and decomposing vegetation can cause excessive nitrite levels. Some pond plant fertilizers contain nitrite or ammonia. Nitrite is highly toxic to pond fish.

Why Test for Phosphate?

Phosphate enters the pond from fish waste and decaying organic matter, such as dead algae and uneaten fish food. Water treatment facilities may add phosphate to tap water to prevent pipe corrosion and reduce concentrations of heavy metals in drinking water. Excess phosphate may lead to algae blooms.