Aqueon Aquarium Algae Scraper, Fish Tank Cleaning Magnets for Glass/Acrylic, Medium

Bought the medium version which is ideal for 10mm glass. Cleans the glass well and, so far, it hasn't become detached from the outside magnet. It's quite hard work though! The only problem, which is minor, is that the inside magnet tends to vibrate or oscillate as it travels, unless you move extremely slowly. This sets up small pressure waves through the water, enough to make the heater elements wobble when you're in the vicinity, and it freaks the fish out a bit, but only while it's going on. Overall, though, I'm very pleased with it.

Straightforward glass cleaner for the tank. Great quality, effective at what it does. It’s not too big, and works well In my nano 3g tank. good value for the money. 10/10

I needed something that would help me easily clean my aquarium as it's over 2' deep and my pleco weren't keeping up. Looked around and this seemed to be the best product for its price. Good size and powerful magnet(watch your fingers). Used it on a 120G tank with 1/3" glass and worked great! Glass pad was needed as the blue acrylic pad was too soft. Takes a few swipes to clear thicker algae but not at all a hassle. Very easy to turn corners and switch sides. Haven't had any issues with the magnets detaching either.

Acuario de 45 litros y funciona muy bien. El imán es potente. Viene con dos tipos de limpiadores uno con una especie de fieltro y otro con un cepillo de finas cerdas

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FAST ARRIVAL, STRONG MAGNET, DO THE WORK FOR THE PRICE!