Most Orange Julius recipes call for about a cup of water, but in my experience the limeade concentrate is never completely frozen, so I do without. If you find that it is too sweet for your tastes, add anywhere from a half a cup to a full cup of water to dilute it a little bit. I tend to like more lime taste than strawberry taste in my drink, but you can add as many strawberries as you want if you want more of a berry taste. Serve immediately.