High-quality algae cleaning magnets simplify aquarium maintenanceOuter aquarium cleaning magnetic assembly made from solid oakInterchangeable scrubbing pads safe for glass or acrylic aquariumsDecorative wooden algae scrapers remove tough, unsightly algae on glass or acrylic. Simply attach removable white scrub pad for acrylic-safe use. Powerful, rare earth magnets hold together tightly but if separated, inner magnet floats for easy retrieval. Includes replacement glass cleaning pad and felt pad for outer magnet. andnbsp; DimensionsTank Size Max Thick (Glass)Max Thick (Acrylic) Piranha 2" x 4"30-125 gals1/4" and 3/8"3/16" and 1/4" Hammerhead 2" x 4"110-200 gals1/2" and 5/8"3/8" and 1/2" Tiger Shark 2-3/8" x 4-1/4"200-350 gals5/8" and 3/4"5/8" and 3/4"Please click on "More Information" for additional information.

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