I would first double check your pH meters calibration to maintain accuracy and continue to readjust the pH of your Waterfarm to pH 5.8.
What is pH?
- Thread starter Racefan
- Start date
I would first double check your pH meters calibration to maintain accuracy and continue to readjust the pH of your Waterfarm to pH 5.8.
Have you calibrated your pH meter with pH 4 and pH 7 calibration solution for a 2 point adjustment pH meter before first using your pH meter?
Slowpuffer
Well-Known Member
I bought a hanna, which was recommended by another member and it lasted 4 months. I then bought a 15$ online meter from china and the only difference is the cheap meter has to be calibrated more often. Other than that, it's excellent !!
You bet! But, I sprung for the storage solution and found that I didn't need to calibrate it as much. I think a lot of guys let their PH meter dry out. Keeping it wet is important.
Greenethumb42
New Member
Here's one after I add my foxfarm notes my ph is 6.5....but my run off will be around 6.1 to 6.2...is that OK or should I raise my ph before I water like to 6.8 or 6.9
Welcome to 420 Magazine Greenethumb42! The pH that you should be adjusting your nutrient mixtures strength to is dependent on the type of medium you use to grow your cannabis plants in. You want 6.5 pH for soil and 5.8 pH for peat moss, coco coir and hydroponics. I believe that you may have a nutrient buildup in your grow medium and should flush your plants grow medium with at least twice as much volume of pH adjusted water as pot size or until your runoff liquids pH is the same as the waters pH your are flushing with.
ok heres a question for you guys who know more than I do first of all I am a small 3-4 plant soil grower using leds fox farm soil and technaflora nutes well I was given a brand dandy new blue lab growers tool box with both a ppm pen and a ph pen my question can I use this pen which is for hydro to measure my run of water to get my ph levels I know they sell a pen just for soil but cash is short
DRM Ranch
New Member
You can, just make sure to keep the pen in storage solution or pH 4 calibration fluid, and rinse it off after each and every use.
Exactly how useful something is or will be is more a function of how you use the tool than anything else.
While it is always nice to have the proper tool for a job, that always isn't going to be possible.
Just be smart about how you interpret the readings you take, and you should be fine.
Google how to store the pH pen and get a good idea of why it is important to keep it stored properly, this will pay off in the long run.
Keep a log of your readings, even if they don't help out greatly right now, a history of readings can identify issues down the road.
Exactly how useful something is or will be is more a function of how you use the tool than anything else.
While it is always nice to have the proper tool for a job, that always isn't going to be possible.
Just be smart about how you interpret the readings you take, and you should be fine.
Google how to store the pH pen and get a good idea of why it is important to keep it stored properly, this will pay off in the long run.
Keep a log of your readings, even if they don't help out greatly right now, a history of readings can identify issues down the road.
thanks for the tips this indoor stuff is all new and there isa big learning curve lol so check the run off and go up or down as needed
PurpleGunRack
Well-Known Member
In my job I often test for pH, EC and dissolved Oxygen when taking water samples from geotechnical/environmental boreholes,
and some of the things the companies that sell pH measuring equipment advise you to do are just not that true.
Storage solution:
The storage solution is basically a salt water solution and dirty/brackish water or buffer solution 4,0 works just as well, though the storage solution is cheaper than the buffer solution.
It was just made to make a standard in the industry and to stop customers calling and asking what kind of saline solution to store their meters in.
Demineralised (distilled) water:
Even though some companies tell you to rinse in deminaralised(distilled) water, this is not a good idea as it will wear out the probe faster
(the ions in the Hydrogen diafragma will want to escape into the un-ionized water and thus wearing out the diafragma faster and shorten the probe life)
Calibration:
Use the calibration buffer to rinse the probe with before calibrating with a new cap of it(stir the probe around well and let the value settle).
Make sure the calibration buffer liquid is not too old.
Never re-use calibration buffer liquid.
Use seperate caps for the different buffer solutions.
Calibrate every 7-14 days to keep the meter accurate.
The buffer solution 10,0 is not necessary unless you need to measure high alkaline levels often (which you shouldn't need for growing purposes) and it has about half the shelf-life of the 7,0 and 4,0 buffers.
Equipment:
Cheap meters can work just as fine as expensive meters, and either way the probe needs to be replaced every 1-4 years depending on usage and storage/cleaning discipline.
You might be able to save a lot of money looking for pH measuring equiment outside growshops.
and some of the things the companies that sell pH measuring equipment advise you to do are just not that true.
Storage solution:
The storage solution is basically a salt water solution and dirty/brackish water or buffer solution 4,0 works just as well, though the storage solution is cheaper than the buffer solution.
It was just made to make a standard in the industry and to stop customers calling and asking what kind of saline solution to store their meters in.
Demineralised (distilled) water:
Even though some companies tell you to rinse in deminaralised(distilled) water, this is not a good idea as it will wear out the probe faster
(the ions in the Hydrogen diafragma will want to escape into the un-ionized water and thus wearing out the diafragma faster and shorten the probe life)
Calibration:
Use the calibration buffer to rinse the probe with before calibrating with a new cap of it(stir the probe around well and let the value settle).
Make sure the calibration buffer liquid is not too old.
Never re-use calibration buffer liquid.
Use seperate caps for the different buffer solutions.
Calibrate every 7-14 days to keep the meter accurate.
The buffer solution 10,0 is not necessary unless you need to measure high alkaline levels often (which you shouldn't need for growing purposes) and it has about half the shelf-life of the 7,0 and 4,0 buffers.
Equipment:
Cheap meters can work just as fine as expensive meters, and either way the probe needs to be replaced every 1-4 years depending on usage and storage/cleaning discipline.
You might be able to save a lot of money looking for pH measuring equiment outside growshops.
PurpleGunRack
Well-Known Member
Sift it the run-off through a clean cloth into a clean bowl and use the pen in it.
4Dutchess
Well-Known Member
I just bought the HM digital PH hydrotester for $50. from the grow shop and now I must learn how to use it. I was told only hydroponics growers need to PH. Im thinking ALL needs to be PH'd????
PurpleGunRack
Well-Known Member
Should be pretty straigh forward, if you read the manual to your pen and my post a couple of posts above you're well on your way.
You might need to leave the pen in for a couple of minutes for the value to stabilise.
Yes basically all growing is optimised by having a correct pH, soil is more forgiving to small changes in pH and reacts slowly, where hydro is not so forgiving and reacts almost instantly to changes.
4Dutchess
Well-Known Member
Im going to take the meter back to the grow shop and see if they will give me a 101 on how to set up/use it. The directions are kinda complicated. This thread is great and will help as I understand my new tool. Thanks so much!
Mentioned before, calibration is the key. Invest in PH 4 & 7 calibration fluid and the storage solution. Should be able to get it all for under $15 and it should last for years. Yea, I did all that but forgot to get spare batteries. My meter takes about a minute to settle down before the reading stops jumping all over the place. Not sure what's up with that and replacing the batteries. They're a year old but I use my meter frequently.
Justones
Well-Known Member
Is the Milwaukee mw102 a good meter?
4Dutchess
Well-Known Member
Nice pic Justones!
My first meter cost $50. and had to stay wet. It broke and it sucked.
My new meter cost $25. and no need to keep wet. couldent be happier.(Healthy Wiser)
Wallykazam
New Member
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?
Pretty difficult to get it wrong. Generally it involves putting the ph probe in the appropriate calibration solution and pressing the calibrate button.
Pens and meters are more accurate than the strips and drops. When they're working.
