This AQQA magnetic cleaner makes aquarium maintenance so much easier! The super strong rare earth magnets hold securely to glass up to 1 inch thick (this XL size is perfect for most standard aquariums). The float-up design is brilliant - when you remove the outside part, the inside piece floats to the surface so you don't have to fish around with your hands. Comes with two different blades: stainless steel for tough algae on glass tanks, and plastic blades for acrylic aquariums where you don't want scratches. The dual-sided design has fabric on one side for gentle cleaning and mini hooks on the other for stubborn algae. The ergonomic handle makes cleaning comfortable, and the blades are easy to swap out when needed. No more arm-deep in tank water trying to scrub algae off the glass! The magnetic connection is strong enough that you can really put some pressure on tough spots without the inside piece slipping. Perfect for both beginner fish keepers and experienced aquarists who want to simplify tank maintenance. Your fish will appreciate the regular cleaning without the stress of your hands in their space. Seriously, if you hate cleaning algae off your aquarium glass, this tool will change your fish-keeping life!