Samus accesses the room after defeating Serris. It is entered by a Blue Hatch. The ceiling and floor of the room is yellow, with a chasm in the floor that is completely submerged with electrified water. Samus will need the Speed Booster to be able to actually reach the control unit as there are Boost Blocks in her way. Some parts of the floor consist entirely of Fake Blocks. When Samus lowers the water level, a message saying "Water level lowered" will appear before the level goes down. This will stop the water from being electrified by the broken conduits. The conduits themselves, however, are still damaging to touch. On the way out, Samus can collect a Missile Expansion on a platform below, and then shoot the Fake Blocks to get back up to the first level.
If a 1% or even 0% run is in attempt, Samus can also simply prepare a Shinespark just after breaking through the Boost Blocks, and then Shinespark to the entrance of the room. The Missile Expansion can be skipped, but it is unlikely she will not come into contact with it.