Paddyob's tanks is running with tap water treated with prime.  
 
There is 2 treatment plants here in Edmonton each will have different water parameters. Check their water test results on the city of Edmonton's website, I've seen it before but I haven't checked for quite some time. 
 
Personally I use ro/di but you CAN use tap water. 
		
	
		
		
		
		
			
		
		
		
		
	
		
		
	
	
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