Freeze the middle Metroid as soon as it comes on screen to use as a platform to cross over the acid. If no Metroids are alive, the far left Rinka can be used instead, at a high angle. The left Rinka can also just be used to setup an angle with the Rinka near the left edge of the pool.

Requires:

"canTrickyUseFrozenEnemies"
"canTrickyJump"
"canCameraManip"
{
  "or": [
    "canInsaneJump",
    {
      "and": [
        {
          "not": "f_KilledMetroidRoom1"
        },
        {
          "obstaclesNotCleared": [
            "A"
          ]
        },
        "canRiskPermanentLossOfAccess"
      ]
    }
  ]
}