You figure if you use the test kits, and have to test them, does not negate the reason to use them to some degree?
I've never had issues with Lamott/Hach, but some cheapy's seem to worjk well enough, certainly not something I'd want to use doing a lot of testing with, but folks seem to do well enough.
Dosing is not a precise act.
So having precise test kits is not really needed to a large degree unless you want to know specific precise uptake rates etc.
You get what you pay for as rule with test kits.
Lamott/Hach are easy to use and easier to read.
I don't tell folks to buy test kits anymore and haven't for a few years other than pH, KH.
Even those are debatable, many use bubbles per second for CO2.
But some folks like testing and seeing. Most don't and it does make things more complicated for many. It cost more. Folks sometimes over rely on their test measurements and lose the primary focus, growing plants.
Test kits often lie and are inaccurate, plants/algae never lie and are my test kits. I use high quality test kits to back the plant observations.
This way I am at a high level of confidence in my measurements.
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