Oceanic BioCube Algae Cleaning Magnet is designed to easily and thoroughly remove algae from your BioCube aquarium. This algae cleaning magnet can be used with other curved glass aquariums that are up to 29 gallons or have a thickness of 1/4" or less.
The weighted scrubber will sink to the bottom of the tank when the magnet is not connected on the other side. There are two magnetic halves.
Note - Not for use on acrylic or plastic aquariums.