noun
General container for holding water, such as a storage tank or a cistern.
屋上に大きな水槽が設置されている。
A large water tank is installed on the rooftop.
noun
fish tank;
Specifically a tank for keeping fish or aquatic life, such as a home aquarium or a public display tank.
熱帯魚を水槽で飼っている。
I keep tropical fish in an aquarium.