1 cup water
3/4 cup sugar
1 cup freshly squeezed lemon juice
1 cup watermelon juice
3 to 4 cups water
Mix 1 cup of water and sugar until dissolved.
Add the lemon juice and watermelon juice to the water/sugar solution.
Add 3 cups of cold water.
Add up to one more cup of water depending on the acidity of the lemon juice.