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Review title: darn it
Product review: the magnet is very strong and cleans very well but sand WILL get under the cleaning pad regardless of what the advertising says. I now have many scratches to repair INSIDE a 700 gal acrylic aquarium I also have scratches on the outside because of the same problem but that's much easier fixing than the inside. You can't always be at the right angle of light that shows when it's scratching the acrylic...
