It is important to monitor ammonia, nitrites, nitrates, temperature and the pH level of the water, to ensure that they are in ‘range’. If not, you need to take corrective action otherwise fish and plants may die or succumb to disease.
- Test kit. Most aquaponic gardeners use the Aquarium Pharmaceuticals Inc. API Freshwater Master Test Kit. This kit is inexpensive (about $AU47.00 at writing time) and is easy to use.
- Thermometer. Get a submersible one. Water temperature is important as it affects fish health and plant growth.
- Dissolved oxygen measurement. This can be done with a kit or a meter, and gives an indication of the aerobic activity in the system, which is important to the bacteria, the plants and the fish. The most accurate measure is obtained by using an electronic one, but remember that you get what you pay for.
- pH meter. Nice to have, as it speeds up the measurement of pH, which is very important.