So simply can pool maintenance be - highly recommended! I can only agree with the many positive reviews. The processing and delivery of the order was exemplary! Since 4 years have tried my pool water to make with other pool care products as well as possible. This I succeeded only with great effort. Only with continuous monitoring of pH and O2 content there I succeeded. The weekly use of oxygen granules, algae control operators and flocculants has always been a very costly affair. Last year, I have now switched to the advice of a colleague to this Multitaps 5in1 and I must say that the use of other water care products was necessary hardly. The water is crystal clear and the tabs are very economical. For my 12,000 liter pool a tab extends up to 3 weeks with me, depending on water temperature. The water is soft and does hardly smells of chlorine. Even with water temperatures above 26 ° C, the water quality without the addition of other agents all summer was excellent over. The price / performance ratio of this product is absolutely correct. 'm Very happy with these tabs, you can highly recommend. -thanks-