White things on my aquarium glass

Jason420

Reefing newb
Hi this morning iwoke up and stated lookig at my tank and noticed these little white things moving around in my glass and on the sand some don't move currently I have 3 turbo snails 3 cerith snails 3 blue leg hermit crabs and a emerald cram and a blue damsel the tank has been set up for roughly 7 weeks these critters are too small to take a clear pic but look like whitish clear color with a black line in middle any help would be appreciated thanks
 
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