you don't want to buy this for
			 
			 
			
		
		
		
		mussels being one of above.  just to  keep it fed you need to constant-drip phyto into tank until tank water takes on greenish tint. tried this once grew my own phyto to feed all my nonphotos until pain in butt became too much to bear. 
		
	
		
		
		
		
		
	
		
		
	
	
	 |