Used to drain water from the tank and to remove silt from the bottom. Very useful in the aquarium.
Are used to measure the acidity. alkalinity, nitrates, nitrites, phosphates, etc. Help to keep correct parameters of the water in the aquarium. Analysed results will give us an idea of what is going on in our underwater world and determine how to act in situations where balance has been disrupted. Fighting algae is much easier when we know the parameters of the water and we know what parameter is to high or to low.