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					Originally Posted by  Myka
					 
				 
				What is there to get used to?  I haven't used one. 
			
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 At one point in the test you have to add .1 ml of tank water. I find you need good eyes and a steady hand to pull this off. Neither of which I can boast of on a steady basis. But I'm slowly getting better too. PO4 and Alk are great. I hope they come out with a NO3 checker soon.