?Unrestricted fish tank:Soft and clean cloth let the fish tank from scratches, used in aquarium glass tank,not suitable for acrylic fish tank.for non-glass fish tank, please buy our acrylic special mini magnetic brush ?Strong magnetic: the use of neodymium magnet, super adsorption force, a magic weapon that keeps seaweed from leaving a trace, an excellent cleaner, will not demagnetize for 10 years ?Mini size: small and arched fish tanks are also suitable, it can bypass the square corners. When it's washing, no corner is missed ?Exquisite design:anti-skid edge, a small, light work of art, easy for the holder to carry ?Friendly to fish: the magnet of the scrubber has a certain effect on water. It can improve water quality, giving the fish a better living environment