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					Originally Posted by TNTCanada
					
				 
				I have used a syringe and lemon juice just be careful it can mess with your PH if you use to much.  
 
Cheers 
Tyler 
			
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 Hmm, I wonder what would happen if you mixed lemon juice and kalk 
 
seriously, kalk paste has always worked for me and it just adds calcium to your tank, although too much can also reek havoc with your ph