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- Dec 28, 2016
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Here is the reason. You're already adding at lease a 2.5% error. Its unnecessary. There is no reason to do it. The test is designed to be done 'to the line' - in a 10 ml cuvette. Second - it may not always be the exact amount every time. Maybe your scale has a problem. etc etc. Just follow the directions IMHO - if you don't want to follow the directions - thats also totally ok - but - then coming and saying 'why are my measurements off' - IMHO - the first place to start is the directions.I appreciate everyone’s input I am highly grateful but I don’t know why everyone is so strung up on weighing the water at least it’s the exact amount every time and as previously stated it meets the line perfectly on the cuvette I’m sure it’s the the salt I bought unpackaged being coral pro rather than blue bucket(which it was supposed to be) I will do a follow up test with salifert but this is the same reagent that I was using when testing the dt with packaged red sea blue bucket I’ve had this issue since doing a large water change with the unpackaged salt.
@Reef. Suggested weighing the water for the ulr po4 checker and it works well for consistent results 10ml is 10ml wether from a syringe or precise scale. The reagent is always measured using the syringe with the tip.