Imagitarium is a company that has been in the industry of aquatic animals since 1974. They offer a large variety of fish and aquatic pets. Their products include: live fish, plants, rocks, substrate, and related items. The most popular product they sell is the fish and aquarium substrate. They have many different types of substrate to choose from including: glass beads, coconut fiber, sand, black gravel, and crushed coral. The substrate can help with the health of the water in your aquarium. The substrate helps with oxygenation and filtration. The particular type of substrate you use in your aquarium will depend on what type of fish you're keeping. For example, if you're keeping an African cichlid you would want to use crushed coral or black gravel. Their website also has a variety of other helpful information for people to learn about the products they sell and how to care for them. They include: how to correctly set up your home aquarium, how to care for your fish, and a list of suggested plants that would best suit your needs. The website also has a wide variety of other fish and aquatic pets that are available for purchase through their website as well as other retailers such as Amazon.com