Juwel carbon sponges absorb odour compounds and turbidity as well as toxic compounds in your aquarium, leaving the water crystal clear. The fact that active charcoal in the form of a sponge is used guarantees even flow conditions for the filter medium, creating a very large and therefore highly effective surface. Due to these characteristics Juwel Charcoal filters are also perfect for filtering out residual medication after treating your fish. There is a myriad of parts, accessories, valves, nets, cleaning products, water products and treatments to name a few that are available for your tank. All these items are designed to make owning and the upkeep of a tank easier for the average fish enthusiast. Once you have found the right item be sure that it is correct for your set up and that it suits, your fish and tank, bearing in mind the size of your tank and the type of fish You own. There is a myriad of parts, accessories, valves, nets, cleaning products, water products and treatments to name a few that are available for your tank. All these items are designed to make owning and the upkeep of a tank easier for the average fish enthusiast. Once you have found the right item be sure that it is correct for your set up and that it suits, your fish and tank, bearing in mind the size of your tank and the type of fish You own.