By testing your aquarium water regularly, you can make sure it remains a safe and healthy home for your fish.
Testing of levels such as:
pH
Ammonia
Nitrite
Nitrate
These parameters can help determining if overfeeding is occurring, and alert you to any issues early.
If your water tests show that any of the levels in your water are very high or very low, it is important to take steps to correct this for your fish health and wellbeing.
Monitoring the water chemistry of the aquarium will allow you to catch problems before they occur. 4 most important levels in freshwater, saltwater aquariums quickly and accurately, including pH, high range pH, ammonia, nitrite, and nitrate.