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It seems to me that 'some' is a good enough measure of plant nutrients in
the plant aquarium. Most cheapo hobbyist test kits can report at least a
reaction of 'some'. The actual numbers don't seem to really matter to the
plants, as far as I can tell, as long as there is 'some' available. So
rather than demanding a high level of precision in the test kits, I'd rather
have cheap dumb kits that report either 'None', 'Some', or 'Too Much'.
Or is that 'too much' to ask?
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