Hey Deb, 
 
Actually those ones may have been propogated sexually.  I remember seeing an article on the web (I forget the link) that showed these same E. quads having a spawn and how the aquarium settled the larve out on some ceramic tiles & small sheets of glass.  Very cool stuff indeed. 
 
Cheers, 
Victor [veng68] 
		
	
		
		
		
		
		
	
		
		
	
	
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