Just as a side note:
To get through the cave you need:
double clawshots
spinner
ball & chain
dominion rod (i think)
back slice & helm splitter also help.
Clear 10 floors for faries in Ordon spring
20 = Faries In Faron spring
30 = Faries In Kakariko spring (can't remember name)
40 = Faires In Lake Hylia spring (can't remember name)
50 = Great faries in all springs