DirectionsSeparate the magnets. Slide the outside magnet across the glass to easily remove algae spots.Place the magnet with the rough surface on the inside of tank. Place the magnet with the felt surface on the outside of the tank.If the inside magnet falls to the bottom, you can easily raise it up by working the outside magnet.
Aquatic Gardens Small Magnetic Cleaner
Size: Small
Dimensions: 1.5"L X 1.5"W X 2.5"H
Aquatic Gardens X-Large Magnetic Cleaner
Size: X-Large
Dimensions: 2"L X 4.5"W X 3"H