This business name was inspired by the word "AQUARIUM". Popularly searched and catchy.
AboutHomeAquariums.com is a .com domain. Dot com domains are the most desirable top-level-domain in the world, famously used by websites like youtube.com. Once secured, a .com all but guarantees no-one else can outrank you for your own name in the long run.
Aquarium Supplies or Fish Store brand
Pet Store or Pet Info app
Content or Membership website