The Dennerle Cleanator is a double-sided glass cleaning sponge for fresh water aquariums. The Dennerle Cleanator easily and effectively removes even the most stubborn algae and limescale residues. And therefore ensures a clear view into the aquarium. The Dennerle Cleanator with two surfaces is ideal for cleaning aquaria. The stainless steel wool on one side removes even the most stubborn algae and residues, without scratching the glass. The sponge side softly and gently removes minor residues. It also gets into the tightest of corners thanks to ist ergonomic shape.+ it easily removes the most stubborn algae and limescale residues.+ gentle on glass, high-clarity glass and silicon decals+ chemical-free+ safe for animals and plants+ child-safe as there are no sharp blades+ long-lasting