Quote Originally Posted by grey1223
I'm not a big fan of testing runoff. Number one is no one seems to know the correct way to measure it. The best method can be found on Canna brochures or go to their web site. But even they say it's a waste of time.
:wtf: ??? He said he has a ph pen, which are the recommended and most accurate method of testing runoff ph. (unless it needs to be calibrated)
As far as it being "a waste of time"...I'm disappointed to hear you say this, as it's one of the most handy numbers to know. Especially if having some problems with the grow.

Razza: I'd take the pen down to a local aquarium shop, and ask if they can compare your ph pen to theirs. (tell 'em your girlfriend sent you, and you have no clue what fish she keeps) This will give you a general idea of how far off your pen might be, so you can make adjustments in your growroom if need be.

Are you using fresh soil? Are you keeping soil moist? (too moist?) Are you spraying them with anything? What's the indicated water ph going-in?