Has anyone else had trouble using the Salifert phosphate test kit, or is it just me? The blue color bars are so close in shade I can't tell what's what. I have a slight blue tinge to the water, but there are about 3 different readings on the chart that it could match - I can't really tell.
I know that eventually I want the test to be clear, but in the meantime it would be nice to know how much my phosphates are coming down. It really only seems to be useful as a binary test - either you have (detectable) phosphates or you don't.
Anyone have any tips for reading the results easier?
I know that eventually I want the test to be clear, but in the meantime it would be nice to know how much my phosphates are coming down. It really only seems to be useful as a binary test - either you have (detectable) phosphates or you don't.

Anyone have any tips for reading the results easier?
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