Break the barrels in this entrance room if you need arrows then light the four unlit torches to spawn a chest with Stray Fairy #1 . Head into the next room, the Waterwheel Room.
Put on the Zora Mask and go underwater at the northeast corner. Turn the yellow switch so that it drops down into the platform and allows water to flow through this pipe. Now check under the platform you entered on to find Stray Fairy #2 .
Now that the platforms are moving, take the southwest one up to the upper level. Defeat the Skulltula here for Stray Fairy #3 and some Rupees.
Leap across to the southeast corner now, there are two Skulltulas so be careful. Use the waterspout to cross over then walk carefully along the pipe to exit at the northern end.
Hop down to the left side then use the ladder to reach the platform with the barrel. Break the barrel for Stray Fairy #4 then pull out the Hero’s Bow.
Look to the very bottom center of the water to spot a jar, break it with an arrow and use the Great Fariy’s Mask to collect Stray Fairy #5 . Put on the Zora Mask and jump into the water, exiting through the upper area with red and green pipes.
Following this path leads to a small side room with Skullfish. Avoid them and get to the platform at the far end. Now use the Hookshot on the chest and open it for the Dungeon Map .