[header] How to care for an american toad [title] Buy a 15 gallon (56.8 l) aquarium for your toad. [step] House your american toad in an aquarium that is at least 24 inches (61 cm) long , 12 inches (30 cm) tall, and 12 inches (30 cm) wide. These are the measurements for most standard 15 gallon (56.8 l) aquariums. 
Purchase an aquarium at a pet store or online. [substeps] Be sure to buy an aquarium with a lid that closes securely.