Yes it's just a scraper but it works. Some scrubbers work well the first few times and then lose their cleaning power. This item has been used a few times and is doing a great job. Most of the algae is removed in one pass, in some places it takes 2 passes, but that's when I haven't cleaned the aquarium for a long time. I love that it comes in 4 packs so if one breaks I have 3 left. Love them just buy them.
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