The AQUAEL SAS 500 Surface Skimmer is an aquarium surface filter designed to clean the water surface of the layer of dirt from dust, protein film or small plant residue. The AQUAEL SAS 500 Surface Skimmer helps maintain the aesthetic appearance of the aquarium and supports the water filtration and aeration process. Thanks to its adjustable capacity, it is ideal for aquaria with large and small water surface areas.A common problem in aquarium tanks is bacteria scum forming on the water surface. It restricts gas exchange, impedes light penetration and spoils the appearance of the aquarium. There are some recurring tips on aquarium forums on how to deal with bacterial dross. Among other things, aquarists recommend installing a sprinkler along with an efficient filter, or an ad hoc collecting of the impurities with a paper towel. However, they point to the installation of a surface filter as the most effective and simplest solution.A built-in sponge pre-filter prevents shrimps and small fi