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Old 01-13-2015, 04:54 PM   #9 (permalink)
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Default Re: Test kits: the good, bad and ugly

LaMotte makes great test kits. Pricey but way more accurate than most. I also find them hard to find.
I have a potassium kit by LaMotte. I like the Seachem kit as it has a reference solution.

I find it difficult to make reference solutions for PO4 as the amounts for 1 gallon are small. My digital scale does 0.00 but I don't trust anything in the hundredths.
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