AquaMedic Mega Mag M 12mm

Mega Mag magnetic glass cleaners are waterproof, corrosion-resistant and suitable for use on fresh and saltwater aquariums, removes debris and algae from the aquarium glass. The floating half of the magnet that is placed within the aquarium can be easily attached to help avoid scratching due to sand and gravel being trapped between the two halves.

Also available in S and L