OK... first go to Zora's domain and go to the top of the water fall (if you don't know how
go to the king's throne and go to the left) and talk to the guy and he will ask if you
want to play a diving game for 10 rupees or so. Say yes the jump into the water and dive
for the red rupees. You only have 30 seconds or more. If you get them all he will tell you
to come back up and he will give you the scale. Now you can dive for 10 seconds. Hoped
this helped.^.^

ok first u have 2 go 2 king zoras chamber then go into the room at the left side and talk
2 the zora and he will throw rupees down in the water and u have 2 jump in the water and
get them all. after that u go back up 2 the zora at the top of the waterfall and he gives
u the zora scale so u can dive 4 6 seconds now. then u go 2 lake hylia and dive in the
water 2 get the object navi turns green over and u bring the bottle with the letter in it
2 king zora and he moves out of the way of the entrance 2 zoras fountain. but before u go
u need 2 catch a fish in a bottle cuz u have 2 give it 2 lord jabu jabu 2 get inside him
and get the princess out. go in the little pond next 2 the zora shop and you'll see fish
swimming around. 2 catch 1 you have 2 equip a bottle and go near a fish and scoop it in a
bottle. then u go 2 zoras fountain and let the fish out by jabu jabus mouthand he will
*** u in and you'll be inside jabu jabu! (p.s. i am an 11 year old girl who's writing
this! hope it helps!) 8-D

It does I've been stuck on that for ages and i didn't really know where to go.I'm only 11
now I have all equipment and just beat spirit temple!(Hooray for me!)