- Ideal magnetic cleaning tool for glass aquariums - Allows you to remove algae and dirt from glass up to 10 mm thick - Strong magnetic force ensures the pads stick to the glass - Double-sided cleaning: cleans from both the outside and inside of the aquarium - Square structure makes it easy to reach corners and hard-to-access areas - Easy to use: the soft pad cleans the outside and the thick one cleans the inside - Includes retrieval cord to recover the cleaner if it falls to the bottom - Compact size: 5.8 x 3.3 x 4.3 cm - Not recommended for acrylic or plastic aquariums