Ecozone magnoloo anti limescale toilet descaler twin pack simply drop one of these ingenious ecozone magnoloo into the cistern to keep your toilet free from a build up of deposits for up to 5 years this chemical free magnetic ring will polarize the calcium preventing unsightly stains and limescale build up the high quality magnets inside the ecozone magnoloo convert the negative calcium ions into positive ions which in turn modify the structure of the lime crystals and reduce or completely e