I LOVE the mag-floats. Used them on my 80g and 10g, and this is the main scraper we used when I worked at Love the Reef. Make sure you get one that matches your glass thickness. The scraper attachment is a must have, but just be careful around the edges of the aquarium. I usually go in with a regular razor blade every once in a while to get the edges nice and crisp but use the mag floats 99% of the time