Depending on the purpose of creating an aquarium, commercial, scientific (experimental and laboratory tests), and decorative, the most desirable pH level should be maintained to provide correct living conditions for the fishes and other possible organisms there. Modern devices are often portable and easy-to-use instruments that help to monitor the changes in the pH level during the day or from day to day etc. The glass electrodes have a long service life, and due to a high level of precision and wide measurement range, it is possible to apply the meter often and detect the slightest deviations. For this type of measurement, the presence of the temperature sensor is very important since the temperature change may occur within one aquarium, and it should be detected at once.
Not depending on the purpose, the aquarium is supposed to fulfill the main task of which own is to create the best conditions and the most favorable medium. This task may be a bit more challenging than it seems to be because just filling in the tank with fresh water is not enough and much depends on the parameters which the water has and how they may change with time. Depending on the fish type, there may be slightly different requirements for the pH level of water (from 6 to 8, on average, but there may be exceptions). A very influential factor is also the type of water the owner decides to choose for the aquarium. Fresh and salty water have different desirable pH levels, and it is important to take this into consideration.
As a rule, salty water has a higher pH value than fresh (8 and more). Before choosing the inhabitants for the aquarium, it is necessary to learn more about their natural habitat because the conditions in the aquarium should be maximally adjusted to the natural ones. The level of pH in the aquarium should be maintained at the desirable level. The growth of pH may have a destructive influence since the growing ammonia deteriorates the water quality and may be very harmful to the fish. That is why pH level control in aquariums is practically a daily task if your intention is to have a beautiful water tank with healthy inhabitants.