Stabilized chlorine tabs contains cyanuric acid. This stabilizer protects the pool's chlorine from degradation from the sun's UV rays. In small concentrations, this is a positive effect, but at high concentrations of cyanuric acid in the water supplied by unilateral use of chlorine with a stabilizer, the protective effect becomes so severe that the chlorine loses its effect. The water has been overstabilized, which means that a chlorine lock has occurred. As a result, the water becomes greenish and cloudy at the same time that the hygienic level drops drastically.
Chlorine tabs make it easy to maintain pool water quality. Chlorine tabs have been developed for the continuous maintenance of the purity of the pool water. We recommend a chlorine content of between 0.5 and 1.0 mg/l for pools with normal activity and a chlorine content of between 1.0 and 3.0 mg/l for pools with high activity. The pH and chlorine level should be checked and adjusted regularly. We can recommend a hand shaker like this one here (Lovibond® Pool tester chlorine/pH - Tablet tester Chlorine / pH (hand shaker) Measures the water's amount of chlorine and pH value).
When traveling away or on holiday, chlorine tablets are particularly suitable if a neighbor or friend has to look after the pool.