I was thrilled to run across a product like this magnetic aquarium glass clearer. Cleaning the inside of my fish tank was always last on my list of things to do till I found this little jewel! Effortlessly cleans the inside of the glass without having to stick your hand in the water and using a little elbow grease. The only thing I would liked to have seen with this product is a bigger size I have a large tank and although it cleans well,it takes awhile to cover a large area However it stays cleaner for a longer period of time.I recommend this product for anyone with an aquarium.It really is an amazing little product.