Aqueon Aquarium Algae Cleaning Magnets Glass/Acrylic, Small, Black

Works perfectly and does exactly what it says it does. It’s super quick to learn how to use and gets the tank really clean.Most I can say is that if you have cheap gravel like I do, you could accidentally pick some up with the brush which could lead to scratches on the glass, so be careful. This also makes cleaning the bottoms of the tank a bit harder with this brush. Still, works great, though.