CrystalSkim 600 by Oase (UK) LtdOur innovative compact aquarium skimmer quickly and effectively removes very fine plant detritus from the water's surface. Naturally, it also eliminates any irritating biofilm, which can even hinder gas exchange, depending on its thickness. After trimming aquarium plants, the skimmer conveniently captures even the finest plant fragments that are almost impossible to remove with a net. The surface skimmer has also proven to be perfect for combating