Salifert Test Help

bollands

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ok i have just bought these and cant get around what line you read in the 1ml syringe do you ALWAYS read from the line furthest away from your finger?
 
when you say black rubber bit there are two seals, one after the other. one nearer your fingers and the other further away, i would have thought the first ring?
 
You don't have to, but you loose precision without it. With the nozzle, your drops are smaller, without they're bigger. If you're just looking to get a general figure, without is fine. If you want real precision, use the nozzle
 

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