My dragonet goes for bloodworms as well. My return pump went out a few weeks ago while out of town and all the algea went septic, so I had to restock my fuge... Still waiting on the pods to grow in, but he is feeding off the rock in my display and also the frozen brine/bloodworm mix. As long as they dont look really skinny under the side fins, you are okay. You may not see them eating because they tend to hide, but that doesnt mean they arent eating.