Set of 3 Joker MAREVA filter cleaners - 5L - 041013Ux3, ready to use, will be effective for cleaning your sand pump. This cleaner will be adequate to get rid of the accumulation of input residues (solar oils, limestone, grease etc.) which were not evacuated during the backwash of your sand filter. It is important to get rid of them. Indeed, they can cause the proliferation of algae nests, scaling and the creation of a hole in the sand that can cause a filtration problem, which has disastrous consequences on the general condition of your pool. This is why it is recommended to clean your filter twice a year: firstly, the cleaning can be done when you put your sand pump away in winter or when it is put back into service in spring. The second time, the cleaning should be done halfway through the summer. Be sure to follow the instructions for use before use. Advantages : Protection of your sand filter against algae Cleans, descales and dissolves Features: Batch of 3 Can of 5 L Dose according to the filter size : 400 for 6 m/h and 50 kg , 500 for 9 m/h and 75 kg Need in filter cleaner : 2 L for 50 Kg of sand and 10 L, 3 L for 75 Kg of sand and 15 L Packaging: One set of 3 Joker MAREVA filter cleaners - 5L - 041013UL Delivered in its original packaging