you may have got it already, 
but JL has a heater sale and I'm thinking of picking up the 300watt titanium heater.  
I only run the one 150 for my 60 gallons of water volume FWIW.  
but it does come on somewhat frequently in the winter to keep it at 25 degrees.  
I like cooler temps so it's always going to fight the ambient temp. 
		
	
		
		
		
		
		
	
		
		
	
	
	 |