When considering the use of Fluval Stratum as a substrate for your aquarium, one of the most important questions to ask is whether or not it needs to be rinsed. The answer is yes, and there are several reasons why this is important. First of all, Fluval Stratum has an alkaline pH level that can be harmful to fish if left unrinsed. Additionally, when you rinse the substrate it helps remove any dust particles that may have accumulated on its surface during shipping and handling. Finally, rinsing removes any impurities in the material such as clay or other minerals that could potentially introduce unwanted substances into your tank water over time. Rinsing also clarifies the color of the substrate so that you can get a better view of your tank inhabitants once everything has been set up inside their new home! In short, it's essential that you take some time out before adding Fluval Stratum to rinse off any dirt or debris so that your aquatic environment remains healthy and balanced.