JBL Clynol cleans and clarifies aquarium water naturally. Micro-fine, natural minerals spread throughout the wate, absorbing a wide range of undesirable materials, discolouration, particles and bacteria through their special surface structure. Binds also heavy metals, ammonium, proteins, odours and many other undesirable substances. The entire aquarium acts as one huge filter. The water is thus cleaned naturally, enhancing the well-being of fish and invertebrates. The initial cloudiness during the application of JBL Clynol disappears after 2-24 hours completely, leaving the water crystal-clear.Dosage: weekly 10 ml JBL Clynol for 40 l aquarium water, in problem cases (e.g. strong discolouration) 10 ml for 20 l Aquarium water. Over-dsoing is nor harmful.