Ahhhhhhhhh... gotcha! Makes sense. You know, being a chemical engineer, I should have sat done and done that math myself rather than... you know... being retarded. I shall keep up the baking soda dosing.  
 
With kalk would you imagine that I'd still need to top up alk? 
 
Thanks Rob! 
		
	
		
		
		
		
		
	
		
		
	
	
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