Aquarium supplies are essential items needed to set up and maintain a healthy aquatic environment for fish and other aquatic creatures. Common supplies include tanks, filters, heaters, and lighting systems. These items help regulate water quality, temperature, and light, which are crucial for the well-being of the inhabitants. In addition to the basic equipment, aquarium supplies also encompass decorations, substrates, and water conditioners. Decorations like rocks and plants provide hiding spots for fish, while substrates like gravel or sand create a natural habitat. Water conditioners help remove harmful chemicals, ensuring a safe environment for species such as goldfish or tropical fish.