
to replace suction cups that eventually fail in my aquarium. They're strong enough to be doubled or tripled when more strength is needed, and the coating protects the glass from scratches. I have bought them several times and will continue to buy them when needed. I use clear gorilla glue to attach them to the piece inside the tank and one or two on the outside to press them against the glass depending on the strength I need. . I even taped them to the suction cups to keep the filter tubes and heaters from detaching from the glass. Out of the box, these magnets seem intimidatingly strong β even too strong. However, this is because all 10 are stacked together, which amplifies their power. To separate them, you can slide them apart like a card from a deck of cards. I also found that a plastic spatula does a great job of separating them. ATTENTION! A stack of these spatulas can pick up a loose magnet from six to eight inches away with a terrifying pop in your fingers! It can also break a magnet into very sharp magnetized pieces. If swallowed by a child or pet, these fragments can cause fatal internal injuries. DO NOT be tempted to use broken magnet parts and dispose of them safely.

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