Not sure if I understood Farmerlion, do you mean cheap pens?
What do you mean with capsules and small container?
I totally agree though re: bad meters...
I think you'd better use your best water straight (rain is usually PH neutral at 7) specially with soil than trusting a lousy meter, because you end up achieving the opposite of what you seek: watering with varying PH values instead of stable, steady PH.
Maybe not the optimal value, but at least steady... while you achieve none with a lousy pen, nor optimal values, nor steady ones.
What do you mean with capsules and small container?
I totally agree though re: bad meters...
I think you'd better use your best water straight (rain is usually PH neutral at 7) specially with soil than trusting a lousy meter, because you end up achieving the opposite of what you seek: watering with varying PH values instead of stable, steady PH.
Maybe not the optimal value, but at least steady... while you achieve none with a lousy pen, nor optimal values, nor steady ones.