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					Originally Posted by  adidas
					 
				 
				if you put out some money for even another 50lbs of rock, and/or get a bigger system for more dilution, I bet it would have a major impact 
 
I added another 100lbs of rock to my system about 7 months ago, and i've done about 3-4 water changes since then, and I've never seen any algae 
			
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 I'm not sure where I would put more rock, but its definitely something to consider. Where did you add the 100lbs, your display or elsewhere? In your system, how much rock do you have?