When I left for the bar, my nem seemed normal.  When I came home 2 hours later there was three in my tank!  Is this a good thing or a sign of bad water params?  I read they like to split after harsh water conditions or water changes.  I haven't done a water change in a week.  So I hope this isn't a bad sign?
								 
				 
 
		 
 
		 
 
		 
 
		