>>1: What is the best substrate to use for Waterdragons?
I use a mixture of bed a beast and spagnum moss in one cage and top soil and sand in the other. I use the top soil and sand in suz cage because he is much smaller and still eats crickets and can get a mouth full of moss if not careful. IMO anything that holds in humidity and isn't full of huge wood chunks is ok for a water dragon.
>>2: How often should I supplement my Waterdragons food with vitamins and/or calcium?
i supplement my dragons meals every two feedings... so twice a week for the little one.. and once a week for my older dragons.
>>3: Is it possible to put crickets in a small dish so they can't jump out and the Waterdragon can go there and catch them?
yep.
alissa