I am currently using a API that is showing zero phosphate. I need a kit that can measure between 0.25 to zero. It is my understanding that a reef tank needs a little phosphate for corals to thrive. My budget is tight. Thanks all
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i have both elos and hanna phosphorus
i have tested them side by side and are both spot on for me
the elos takes a lot longer to do
the hanna PHOSPHORUS takes 3 minutes so now i use that one the most
the only drawback is you have to multiple the number by 3.066 the divide by 1000
there was a brs video about the phosphate test kits and accuracy
both of these are great test kits