Daniel@R2R
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My Tank Thread
I think the goal is consistency. I would worry less about variation across brands as long as your results are consistent within the same kind of test. If it's inconsistency with a single test kit, I'd suggest trying a different kit as it may be a bad reagent...Is it ok if I rant a little?
How can test kits give such different results? I'm talking a 100ppm calcium difference and a 2.0 DKH difference.
I want my sps to do well but it stinks when all these test kits give such different results!!
Rant off...for now....
Good luck!!