06-07-15, 08:57 AM 
		
	
	
		I have always bought mine is a bigger bottle and just followed the instructions. It was the only size I could see on Amazon yesterday, it is normally on eBay as well.
The picture says treats 10 gallons, as it is made in the USA (4L per gallon) I would have thought half the bottle would do one Gen 1 tank
	
	
	
	
	
The picture says treats 10 gallons, as it is made in the USA (4L per gallon) I would have thought half the bottle would do one Gen 1 tank

