Of course Crystal Light is OK to drink on JC and yes, you CAN count it as part of your water. This drink doesn't contain anything that will cause a problem for you. These are the nutrition facts from
http://www.kraftfoods.com/crystallight/mai...duct=4300097199 If putting Crystal Light in your water will encourage you to drink more water, put the Crystal Light in your water! It does no harm whatsoever!
Serving Size 8fl oz
Servings per Container about 24
Amount Per Serving
Calories 5 Calories from Fat 0
% Daily Value*
Total Fat 0g 0 %
Saturated Fat 0g 0 %
Trans Fat 0g
Cholesterol 0mg 0 %
Sodium 0mg 0 %
Total Carbohydrate 0g 0 %
Dietary Fiber 0g 0 %
Sugars 0g
Protein 0g
Vitamin C 100 %
Calcium 10 %
Now I also want to encourage you to try to drink some plain water with lemon which will help your body to release water weight. I like to drink Pelligrino sparkling water or Perrier sparkling water. Try to have some sparkling water instead of diet soda with your dinner and I think they will help you break the diet soda habit! But in the end, if you can't, at least drink the equivalent of 8 eight once glasses of water (including the water with the Crystal light) per day.
Wishing you all the best!