The MagScraper is a great tool for removing all the stubborn unwanted algae from your aquarium glass.
The stainless blade seems to remove a full 65mm width strip of algae from the glass with a single pass.
The XL MagScraper version reflects the high levels of rare earth magnet material used however it is comparable with other magnets capable of use on such thick glass. It can be used for glass thicknesses between 10 and 19mm but will also work on 24ml glass too if care is taken.
This is a must for use aquatic shops too as it halves the cleaning time and gets into places that a normal magnet will not reach.