| Yes that is true. Both of my tangs regularly pick up sand to aide them in digesting the algea that makes up the majority of their diet. My Sailfin (omivore) to a lesser extent than my Kole (algeavore) tang. Much like birds using gravel to aide in the digestion of seeds.
__________________  Currently tankless. 
20 Gallon mini reef with mated pair of Maroon Clowns given to Rougiem! 
80 gallon reef given to Rougiem/Wooster HS.
Last edited by Craig Manoukian : 03-31-2005 at 05:16 PM.
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