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					Originally Posted by  ensquire
					 
				 
				Grizz, 
Did you buy the external or internal ballasts ?  
I have been looking at these myself recently and like the cost. 
I am thinking of upgrading from my cheapo hagen fixture on my 36 gallon.  
The 24" expandable looks about right for the tank, but I don't like the external fan and have never had external ballasts before. 
			
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 The ones I got are external ballast for both MH and T5s, I like the external fan that goes above the MH bulb, very quite and can be put an a timer so that they come on with the MH.