its the planets on the front of the fountain
there is a goth girl in the wind mill and she will give you the code
In Poptropica's Astro-Knights Island, to find the Fountain Code, you need to retrieve the missing letter from Mordred's room. Once you get the missing letter, use it to decode the message and obtain the code for the fountain in the Knights' Chamber. Use the code to unlock the fountain and progress in the quest.
Use the code backwards then press on the sun. it opens the fountain.
in the town square
on the fountain its shining
In the fountain
you jump on the sparkle in the fountain
you have to get a code from the girl wearing black in the mill. but first you have to get the secret message from the maids room on the left side of the castle and when you find the room go in and on the right side of the room there is a peice of paper,you take that to the girl and she will give you a code to get under the fountain.
it's not located under the fountain it's located in moldreds lab
apparently you can't/don't need to fix the fountain. it bothers me.
you go by the hay bales and separate them and use the key you key inside the fountain if you put the code in and go in the cell and get the fuel
You Go to the fountain and then you see the sparkle on the fountain on the right side of the fountain and then you walk to get it.