Review on Hygger Aquarium Algae Magnet Cleaner: Powerful Magnetic Cleaning Tool with Scraper and Floating Brush for Fish Glass Tank by Sharon Mitchell

This thing has SERIOUS magnets. It is no exaggeration to say that when you put the two halves together on the outside of the tank they are really difficult to separate and result in a very powerful cleaning of the tank. With this piece you train your hands. The very strong bristles cut through algae that I used to have to remove with a razor blade and the metal scraper head is great for corners, edges and very ingrained dirt. Buy this and save yourself the trouble of using a traditional handle scraper, you will NOT regret it.