Any kind of suppliments?

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Looks more like the Apatasia. Oh and I also got a longer look at the little buggy creature scurrying around my live rock. He's about 3mm long, so very very tiny. He's a tannish color with a white stripe down his back, almost like a spine. I didn't see any front legs like the mantis shrimp but he was moving around to much for me to get a good enough look at his front end.

What should I do about the apatasia? I rotated the live rock to get a better look at the one I found and I saw two more even bigger specimens.