Scan every room for a possible power-up. Often times you will need to solve a puzzle to reach a specific power-up.
For every Energy Tank you track down, your maximum energy reserve will increase by 100 points.
Space Jump Boots
Once you find this upgrade, you will no longer be hindered by liquid environments, you will be able to float on command while underwater. Press and hold after performing a Space Jump to rise through the liquids.
After executing a Space Jump, press repeatedly and with good timing to initiate and perform multiple Screw Attacks. As you guide Samus with , you'll damage enemies and cross huge horizontal distances. If you perform this while facing and touching certain walls, you will perform a wall jump.