Zelda Twilight Princess help

I have just collected all of the Tears at the big lake and i am stuck on what to do next. I though i needed to go to the bottom of the lake but have no idea.

please help!

thanks

find some horse grass, once you use the cannon thing to fire yourself up out of the lake there's horse grass near there, blow it and epona will comebobbetybob

[QUOTE="bobbetybob"]find some horse grass, once you use the cannon thing to fire yourself up out of the lake there's horse grass near there, blow it and epona will comeandyrulesliver