It seems like a great idea, but not so great in practice. It's really no easier to use than your standard "razor blade on a stick" type of scraper, and doesn't seem to clear algae off the glass as well. It leaves a lot behind. Seems well built and magnets are very strong. Not worth it, in my opinion. I think it would be best for very tall aquariums where reaching the bottom with a stick scraper would be awkward and difficult.
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