Murky "healthy" Water

[sunce_22]

I do have a fine sand substrate, its live reef aragonite. I did not rinse it before I put it into the tank. It was murky for the first few days and then cleared up, but since I have put in my clean up crew and a fighting conch the water has been consistently murky.

Are they simply stirring it up so much that it can't settle?

I have 25 hermit crabs
1 fighting conch
1 feather duster
1 dark purple tube anenome
and a handful of snails

P.S. The tank only has coraline algae growing on the glass.
I supplement the snails and conch with drop in algea pellets.