Knowledge CentrePlease have a look at the documents below, where we address specific issues and educate our customers in pool care. The Basics of Pool Care How to start up again after re-marbelite Basics of Pool Chemistry Chlorine - ORP vs PPM Understanding the Effects of low pH PoolSense asking for too much chlorineHaven't found the answer?We will get back to you as soon as we can. Alternatively call us during office hours on +27 76 135 4840. Submit a ticket