cannabineer
Ursus marijanus
Dissenting opinion. pH meters benefit from a two-point calibration, typically using cheap and available 4.0 and 7.0 buffers. Single-point calibration could skew the slope.
Whats wrong with my plants?
- Thread starter QeedFarmer
- Start date
sarahJane211
Well-Known Member
As you're aiming for a PH a bit less than milk the slope doesn't matter, you just need a reading a bit less than the milk gives you.
Try it, then tell me I'm wrong.
cannabineer
Ursus marijanus
I have used pH meters professionally. I have always experienced them to be fussy unstable things, even the four-figure benchtop models. To get truly reliable readings, a third calibration at 10.0 allows the device to be kept more linear.
However I have no quibbles with getting lucky. Right up until the lucky streak ends.
pH meter electronics have provision for value ( first calibration), slope (second calibration) and linearity (third calibration). Left uncalibrated, I’ve seen pH meters give unreal readings. Ymmv
sarahJane211
Well-Known Member
You don't need a reliable or accurate reading, you just need comparative readings (and milk is a good comparison)
It's not as if a 0.1 error will kill all your plants (or even a 0.5 error).
cannabineer
Ursus marijanus
In DTW hydro, that is simply not correct. I have seen profound consequences with a pH error of 0.2, and calibration moving the value by 1.0.
In my opinion, your advice could harm a hydroponic grow.
cannabineer
Ursus marijanus
So, in compliance with your instruction: you’re wrong and maybe consequentially so.
Lpena007
Well-Known Member
Lmfao
Hydro is one of the easiest to grow.
I grow hydro. Basil like most greens is a low light crop. Cannabis isn't. You need more light and proper nutrients. That plant needs more calcium and magnesium to begin with and later will need a changing mix of NPK and micros. I highly recommend GH, Dyna Gro or any of the myriad others. I personally stay away from Advanced because they have been sued in my country for not having what is listed on the label in the bottle. Good luck with your grow.
Yup follow the recipe
QeedFarmer
Member
Update: Can it be tip burn guys?
I have measured TDS again, and eventhough, both plants get the same mixed nutrient from the same big bottle, the yellow tip one is off the chart with close to 2000ppm, the other is <1000, that is, after is 1 week I filled the nutrient.
Anyway, I filled some water in and tds is now around 800ppm. I also increased light intensity.
I'll monitor and let you know
I have measured TDS again, and eventhough, both plants get the same mixed nutrient from the same big bottle, the yellow tip one is off the chart with close to 2000ppm, the other is <1000, that is, after is 1 week I filled the nutrient.
Anyway, I filled some water in and tds is now around 800ppm. I also increased light intensity.
I'll monitor and let you know
Lola Grows
Well-Known Member
Literally 2 years later! I’m a woman and HLG lighting is still my preference as for the nutes I like flora. It’s totally ok because Lola means loloita… I only found out it was a song about a guy when I came here. Shook me to the core but I was too young to know about all of that stuff then. Happy growing