How do I start fish flushing?

Hint 1 of 6:

Fish flushing is the main reason for an Outhouse, in Zanydu.

Hint 2 of 6:

You will need a fish.

Hint 3 of 6:

If you have the red herring, then you are ready for fish flushin'.  If you
don't then you will need to get it from King Huey's trophy room.

Hint 4 of 6:

For further instructions about fish flushing, read the toilet paper.

Hint 5 of 6:

Place the fish in the toilet and fish flushing will begin.