How difficult has it been to care for him?
I have a Blue Dragonette as well. He is super easy to care for. They eat copepods, so as long as you can keep your tank stocked he's good to go. I've restocked two times now. I still have a pretty large population an feed the copepods. They say that typically after the third batch that they will naturally populate your tank. So basically his food is sustainable in the tank. He will usually have some of whatever I feed my other fish too. He's super fun to watch and full of personality.
There are some great videos on how to care for them on YouTube.