This product is almost perfect for cleaning Coralife Biocubes. I have used it on my Biocube 32 and found that it cleans the glass MUCH better than other magnetic cleaners I have tried, and the curved edges are a real plus for those hard-to-reach areas on the aquarium front and sides. I found that it cleaned green and brown algae easily with 1-2 passes over the surface. I would have liked a larger footprint/surface area and a stronger magnet, but with a little practice you can avoid having the magnet detach. Perhaps this is only my personal choice and I would imagine that some prefer the smaller size because it can navigate between aquarium obstacles easier? I rated it highly based on the ease of use and thorough glass cleaning. It's become my go-to Coralife cleaner.Purchased to clean the rounded corners of the tanks. It didn't performs as expectedDoesn't work great.I’ve found the “corner” cleaning aspect and overall it does a pretty good job if you stay on top of your maintenance. If you let algae grow for too long, expect to work harder to remove it. I like that it matches the bio cube tank. I have used mag float for many years (over 20) and to me the magnet seems stronger, the attraction between the polar opposite is way stronger than any other cleaning device like this I’ve used. Time will tell how this ages, I will update if I find a diffing result(s) over time.Works as expectedThis cleans my Biocube 32 fairly well. A few passes a week can get rid of everything, except for the back of the tank. The edge piece works, but needs a few swipes more than the flat surfaces. Gets the job done.It barely cleans any flat surface so you still have to get in there by hand with a kitchen scrub sponge. It will also not clean the corners of the very tank it was designed to clean, and worse — it actually scratched the glass. Not happy!This is my second and does great for cleaning the corners of a bio cube. Helps with quick cleanup on the hard to clean spots. I use this and a small mag float to clean every couple days.Excelente para limpiar la pecera de una forma rápida, en mi caso lo uso para un nano marino, y lo limpia bien, eso si hay que darle varias pasadas, ya que el material con el que limpia es como velcro.Nice magnetized algea scrub brush for my biocube aquarium does the curb glass very well.