Any idea what this is?  It looks like little short white hairs.  It was growing in the shadows of my tank. I turned the rock over to see if light to kill it, but I’m not really sure what it is.  
PH 8
Am 0
Nitrite 0
Nitrate >10
Cal 420
Phos .02
				
			PH 8
Am 0
Nitrite 0
Nitrate >10
Cal 420
Phos .02
 
	 
 
		 
			 
 
		 possibly some species of vermetid. In any event, here is a link on RC of them -
 possibly some species of vermetid. In any event, here is a link on RC of them - 
 
		 
 
		 
 
		