What is aquarium gravel?
Aquarium gravel is simply gravel that goes in the bottom of your aquarium. You can also use sand instead of gravel. The gravel has several purposes: It makes your tank look nice, it hides waste (which is why you should gravel vacuum once a month or so), and it provides surface area for good bacteria to live on. It comes in many colors, including brown, white, black, and neon colors.
