When shopping for your next aquarium, you may come across this product. But what is a ceramic ring? Why do I need it? Are there any benefits to using them? Are there any drawbacks? We’ve answered all of these questions and more in the following guide, so continue reading for more information. Ceramic rings are made from ceramic and they are generally white in color. These rings have many small holes on their exterior. The holes create a porous surface as by beneficial bacteria to adhere to it, which then helps filter the water in your aquarium