Cleaning your aquarium just got so much easier with this hygger magnetic cleaner! The strong N45 magnets hold firmly to your tank glass - the L size handles tanks from 0.4 to 0.6 inches thick, while the M size works for 0.2 to 0.5 inch thickness. What's really clever is the detachable blade system: you get a stainless steel blade for tough algae on glass tanks, and a plastic blade that's safe for acrylic aquariums. The floating design is genius too - if the inner part detaches, it floats to the top so you don't have to fish around for it. The combination of soft fluff pads and scrubbing pads means you can both wipe away dust and scrape off stubborn algae in one pass. I love that I can clean my tank without getting my hands wet - just move the outer magnet around and watch the inner part follow along, leaving sparkling clean glass behind. The instructions are clear about not using the steel blade on acrylic tanks (to avoid scratches), and they include cardboard to separate the magnets during storage. If you're tired of the hassle of traditional aquarium cleaning, this magnetic cleaner makes maintenance quick, easy, and actually kind of fun!