It's the cheapest one, it looks like a good deal. And it is once you get the two sides to sandwich the glass but they need a little coaxing on a 120 gallon tank. I have to guide the inside piece so they will attach. Once attached they're fine. This wouldn't be an issue but there's multiple sides to the tank. Gotta do it each time. Also the thing is pretty big. It's not something you keep in the tank for easy access. I thought the large size would mean better magnet but I was wrong.---------------------- Update --------Kedsum contacted me concerning my review above. They seem to be a good company that cares about their product. I gave them an extra star for the curtesy contact and not being pushy or defensive. My glass is probably too thick for the magnet. After using it for a bit, it does clean the glass but it is still annoying when it detaches and heads straight for the overflow. To be fair I've got a ton of flow in there. It's the aqueon 120gal.
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