Yes. A septic tank riser is a pipe made of either plastic, fiberglass, or concrete. It creates a vertical portal at the ground surface for easy access to the septic tank for inspection and pumping out. The lid is then either left exposed or with a very thin layer of soil and grass over it.
A riser is beneficial because it makes your septic tank more assessable. It also helps you save on labor expenses if there is an issue with your septic system.
You can generally use household cleaning products, like toilet cleaner, without harming your septic system. However, you should avoid using an excessive amount of them.
Note that the following products can result in damage to your septic system:
Every three years, for a household of four is the best schedule to remember. You should have your septic tank pumped more frequently for larger households and less frequently for single user households.