This works great on my 55gal aquarium. SO much better than those tiny things. This one is big and the magnet is very strong. Only improvement I would make would be for the "in-the-tank" part to be slimmer. It tends to bump my decorations and plants while I'm cleaning. Also can't get to the areas behind my pump, etc. but that's to be expected with a tool like this. Overall it works really well, both at removing algae and at staying where I want it while I'm using it (strong magnet).
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