I can the "hydro-force flow clear chloinator" only the best grades ausstellen.nach installation and adding about 44kg of salt in 10250 ltr.wasser which is water-clear and without any traces of algenbefall.das device running the moment every day 2 std. Parallel to sandfilteranlage.wie the cleaning power at high outside temperatures is remains to be seen, but I am sure that only the little erhöht.alles to bathe operating time in all a good decision without chemicals!