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					Originally Posted by  Vancity
					 
				 
				I actually bought a bottle of it yesterday from home hardware for $7 to clean and prep aluminum for paint, very nasty smell. 
The label says you can add 200ml to 10,000 litres of water to affect PH by a certain number (can't remember) though I've read over the last year several experienced reefers don't even test or bother with PH anyway 
			
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 pH isn't normally too much of a concern, but it sure can be if you drop it real fast by adding a bunch of acid, so in this case testing and bothering with pH may be granted.  
