An Aeion Tank is a new expansion in Metroid: Samus Returns. With each Aeion Tank, Samus's Aeion Gauge is increased and expanded by 50, allowing her to store and use more Aeion energy. The tanks appear as floating yellow cubes with a pattern on each face, and each tank is positioned above a pedestal. Samus can obtain 15 Aeion Tanks in the game, in all areas of SR388 except for Area 8.
"Increases your Aeion Gauge by 50 and completely restores it."
"Aeion Tank acquired. Aeion Gauge expanded."