How long has your tank been running, as well how big is your tank? Dragonets need to eat ALL the time, and they primarily will eat your copepod population. So if your tank isn't larger than AT LEAST 30 gallons with like 40+ lbs of LR, the dragonet wont live very long. Sorry if I am shooting that idea down, but they are a very demanding fish which fish stores everywhere sell cheap adn probably tell ya that they should be fine.