More info please, but here's the gist:
If you found a pearl on the right side of Home Waters and used it to open a gate to Open Waters, then travel either east or northwest from the latter map, although I recommend going northwest (easier). You'll know you're on the right track when you see a darkened area while going up, don't let that throw you off.
If you didn't find the pearl, then the previous section should help. Whatever you do, don't go all the way down until you go all the way up, and good luck!
