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Tank is a common suffix for expansion items or technology in the Metroid series. You may be looking for:
Expansions[]
Energy Tank
Missile Tank
Super Missile Tank
Power Bomb Tank
Aeion Tank
Reserve Tank
E-Recovery Tank
Other uses[]
Tank Jingle
Central tank
Cryosleep Tank
Mixing Tanks
Gestation Tanks
Incubation Tanks A and B
Aurora Unit tank
Central Specimen Tank
Metroid tank barrier
Water-filled tank
Water Tank
Breeding tank
Fake tank
Ionized Nitrogenic Coolant Tank
Samus Tank