One of the minor problems that many aquarists have with tanks that have curved corners, such as many of the all-in-one nano cubes, is that they can be difficult to clean at times. The curved corners look great from the outside, but they are hard to clean when using many of the popular algae scrubbing magnets. Because of this, the tank can look quite dirty even after a casual cleaning. Additionally, it can take so much more effort to clean the corners of the aquarium, that they simply do not get cleaned. Fortunately, there are ways to quickly clean those pesky rounded corners. For one, some algae magnets are designed for just such a situation. Secondly, you don’t have to limit yourself to the algae magnet. There are many long handled scrapers that can do the job with ease.