Step 4: Add the Rest of the Ingredients
Next add the key limes, mint and yeast.
Then fill the jug most of the way full with water. It's important to leave some air space at the top of the jug for the foam that will be produced during the fermentation.
We accidentally did the water and ingredients backwards because we were distracted by the documentation. Thankfully we remembered to stop adding water while there was still enough room to add the other stuff.