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Can someone link me a good PH tester?

What are you using it for? Hydro isn't rocket science and plants have been growing forever without human help so I don't see the need to have an expensive meter. How often do you calibrate it? 
 
What am I missing? 
 
I use a constant reading ph monitor with a replacable bnc probe. I paid $35 for it about 9 years ago and its been running ever since. 
 
You're missing a lot me thinks.

Hydro plants don't grow on their own but as the result of a balanced nutrient solution within an acceptable pH range.

One can use drops on the cheap. But again, you get what you pay for. If +/- 1.0pH doesn't seem high as an error rate, tickety boo. I paid for +/- 0.1.

rickster said:
i would like to find one that will also read npk.
Click to expand...
You'll get shit result without heading towards scientific grades. LaMotte makes a decent soil nutrient kit. Nutrient concentration won't be determined properly by anything Rapitest makes. Garbage in, garbage out.
 
rickster said:
i would like to find one that will also read npk.
Click to expand...
there are instruments called selective ion electrods... but they are stupid.

just mail in leaf tissue samples and get an analysis done on the leaf tissue... if you have an issue, then fix that issue.
 
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