what is this?

if you can/t see it clearly. they are there little white things that pop out of the rocks that open up like their looking for food!
 
Can't see anything, pic is only like 1"x2" on my screen. Just taking a wild guess from your description... feather dusters / tubeworms?

One potential problem I see in the tank shot is the water level .. well... isn't level.
 
Definitely gonna need better pics. Not much detail to pick out of those.

And I'd agree with Ace25, that looks very off. Being off level slightly isn't the end of the world (although it is still a potential failure point), but that looks off by quite a bit.
 
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