.. Fixing the clock pendulum

First, you should help the tentacle guy.

Good. I think he left you a bottle.

The bottle would work as a pendulum weight, wouldn't it. Try it on the pendulum. You need to tie the bottle into the pendulum. ( You can tie it with a half rope. )

Fill it with something.

Fill it with water. ( Use the empty bottle on a fishbowl. ) Use the heavy water bottle on the pendulum.

Use a half rope.