Just calibrated mine the other day. In my case, it's a simple screw I turn with a small (provided) screwdriver while the probe sits in the calibration fluid.
Depends what you are growing in and what you need IMHO. Soil is more forgiving than "unnatural" ways like Hydro mediums where you may want a more exact number and not a "looks like it is close to about x.xx PH" (which is all you can get with drops/tape as they are only good for a "ballpark" reading basically). It is a weed after all and not like Mother Nature adjusts the PH and PPM to a certain number before it rains (nor does she only rain a certain amount and a certain way), as the plant will adapt to whatever environment it is in up to a certain point. So some try and make it an exact science to increase quality and yields, as to how much things like that affect it is probably up for debate, as it is harder to have a controlled experiment when two seeds from the same plant will act totally different (even Clones). Along with different strains prefer different conditions (RH, PH, amount of light) and amount of Nutes etc....etc...I mean folks used to grow it outdoors in middle of nowhere in the forest, and once planted they would only come back at harvest time, and they managed to get something out of them, just the quality and quantity potentially lower than in a controlled environment on a plant by plant yield/quality difference. But what do I know as I'm still learning, and probably still be learning until I die.So why is a pen you need to clean and calibrate better than a strip or a tubed soil test......the whole calibration thing seems like a real pain in the ass.....what if you get it wrong?
So why is a pen you need to clean and calibrate better than a strip or a tubed soil test......the whole calibration thing seems like a real pain in the ass.....what if you get it wrong?
Even top quality probes for professional meters only last about 2 years depending on storage/cleaning discipline.No I really don't think so. But if you're getting 2 years out of a cheap one then you're doing great.
Well, I have technician/user level knowledge and a little theoretical knowledge.Hey PGR I talked to you once about probe storage solution. I have a Bluelab combo meter. Most of the storage solutions seem to be KCl. Was thinking about making my own but haven't gotten around to it.
It seemed to me that when I just leave the probe in the barrel of rainwater I use for the plants- it lasts just as well as it does in storage solution- and the ph doesn't need calibrating as often. It's recommended to change the probes after a year anyway. I have a spare - but it's been a couple years and the first probe is working fine still.
You sounded like you have a bit of knowledge on the subject - and said that this storage stuff, which can be expensive, isn't necessary and 'brackish water' would work just as well. Can you elaborate a bit on that maybe? I'm curious about what's behind that statement.
Generally- what solutions would be good for a probe and what would be bad - and Why....and what you meant by 'brackish water'. Thanks!
I've heard some people say they got a meter that can be kept dry, but never seen one myself.Thanks mate. Reps for that info. Sounds like rainwater is a bad thing to store it in- which I guess I knew already. I have some KCL solution.
Bluelab recommends using their storage solution - which when I finally managed to locate some in the country, was almost $100 before tax and shipping, for 100ml (!!!!!).
Some people/some meters seem to get away with being stored dry. Some of the Oakton pens apparently say they should be rinsed then stored dry. How? I never have even able to store pens dry without them going crazy - but some people do. It's something that seems to cause extra confusion among the already confused users of cheap ph meters. Different sorts of probes? Luck?
Not kilogram, but gram 22 kg is like a medium sized dogBluelab didn't push it at all- was just a little note somewhere in the manual. And I emailed them they said I could actually use any brand of storage solution.
22kg of it in the bottle sounds like a lot- don't know if that's a typo. Anyway- my impression from testing the ppm of the kcl solution - is that it's just a fully saturated solution.
I don't mean to take your comments out-of-context, but pH'ing your water either before adding noots or after adding noots may depend on the recommendations provided for the specific Nutients that you are using and the feeding schedule/directions provided by the manufacturer, no?Yup! You've really got to measure the ph to tell what you're getting. Mix in the fertilizer first to tell where it leaves the ph, then adjust as necessary. If you adjust the ph first then add the fertilizer, you'll end up having to adjust the ph yet again to get it right, taking more time and wasting your ph adjuster in the process.