Sorry to contradict the previous opinion, but this product works perfectly! I think fondly of past times past with various chlorine, ph analyzes verdissantes or troubled waters, it's past all that! This product was recommended to me by a seller Casto who knew his stuff, I listened and I am glad! No smell or taste of chlorine, crystal clear water at all times (even when I forget some processing time), recovery for the first time after winter water practically perfect, no greening, nothing! And I add a box made me the season, for an above ground pool of 30 m3, while the dual bag is for 20 m3, no less! With the help of a flocculant (of the same brand), maintenance is a perfect sinecure, I did not even ask me the fateful question "how she is this morning?". Add to that a small vacuum cleaner robot, and perfection is permanent, water as I dreamed, tiny already! And for reassurance, I have no action or acquaintance with the producer, just a desire to thank him for the undeniable contribution of serenity, cheap, it's true, but priceless .. Material: Intex above ground pool 30 m3 sand filter 8m3 / h and robot vacuum same brand, if available + sun!
