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PH Testing
snowmanbl90dstarted grow question 4 years ago
I have a vivosum ph meter, a ph tester for the up/down ph liquids and ph test strips. All of them don't seem to agree with each other with in a range of 1 ph across the ph scale. My question is what is the most reliable or is there a different method I should use?
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DeadwebsiteBoringcommunityanswered grow question 4 years ago
as long as your water is clear and relative clean... The ph drops are by far the most reliable and accurate... Iv'e used pens, strips and drops.. And I always go back to the drops. By the large volume test fluid and your golden.
NobodysBudsanswered grow question 4 years ago
if it resolves down to .1 pH, it's useable. You don't need precision beyond that for most things.
As far as which is most accurate. If you have some callibration liquid of various pH you can see how they do. Unless you have a blue labs callibrated meter or equivalent, it's going to vary a slight bit, but again, don't need lab precision on this. If you randomly sway +/- .2 pH from whatever optimal is, it could actiually be beneficial and rarely would that be an issue... maybe in hydro?
your soil will buffer and correct pH too.
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DeadwebsiteBoringcommunityanswered grow question 4 years ago
That being said certain nutrients will/can make your drops very hard to read.. Pens are more accurate in this regard.
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ChitownCannaChicaanswered grow question 4 years ago
IMO the most reliable is litmus paper...
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