The Germinator
Well-Known Member
I got a question for everyone or anyone. I bought some calibration fluid to calibrate my ppm meter. How do I know which number to use to calibrate to? It Has three diff ones.
Ppm calibration
- Thread starter The Germinator
- Start date
Check your meter it should tell you which one.
Edit: maybe even check online from the retailer
Edit: maybe even check online from the retailer
Scientific
New Member
Those different scales and units are confusing, no?
We use the NaCl scale, so your meter should read 1500 PPM in that solution (or an EC of 2.93 millisiemens/cm ("mS/cm") or 2930 microsiemens/cm ("uS/cm"), which is the value shown on the bottom row of the label).
(That's the equivalent of 1.5 grams of table salt (NaCl) dissolved in a liter of water.)
We're not supposed to link out, but you can read up on this right at the manufacturer's website if you want by googling:
site:generalhydroponics.com Questions regarding TDS, EC, PPM, etc.
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The Germinator
Well-Known Member
Thank You but already did that. It's just a cheap one. No information is out there that helped. I got the best info here.
On a good note I've had my meter over a year and it was less than 30ppm off.
Nice! Glad you go it figured out. I went and checked mine and nothing. Cheapo Chinese things....
Damn google household items that can be used to test ppm
Let's say vinegar Say it says it's suppose to be 85 ppm your meter should agree ?
Just can't remember what they use sorry
I have never calibrated meter in two years nor changed a battery I paid 20$ for it. Off eBay
Crazy right some would say
Let's say vinegar Say it says it's suppose to be 85 ppm your meter should agree ?
Just can't remember what they use sorry
I have never calibrated meter in two years nor changed a battery I paid 20$ for it. Off eBay
Crazy right some would say
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- #7
The Germinator
Well-Known Member
Why google ? I have calibration solution.
On another note. I did try that first.
Was surprised mine was only off a little. Not enough to matter. Ph meters you def wanna calibrate or check once in awhile. At least I do.
Scientific
New Member
Vinegar might work, but it's pH is going to be low enough so you're calibrating a long way from the value your measuring, and more importantly, it's nothing like an analytical standard.
A bottle of calibration solution doesn't cost much.
Given how far off a meter can get, especially as the electrode degrades (they don't last forever even with good care), I'd say if you're not going to calibrate, just don't bother using a meter at all. You can always get colored drops for aquariums at the pet store...
Why google ? I have calibration solution.
On another note. I did try that first.
Was surprised mine was only off a little. Not enough to matter. Ph meters you def wanna calibrate or check once in awhile. At least I do.
Yeah I would but I run advanced nutrients ph perfect so I don't ever check ph . When I did a year ago lol it was 5.9 or something after everything added of course ..
Scientific
New Member
That's yet another vote for the pH Perfect line, which seems to have lots of satisfied users.
If I do another hydro grow, I will definitely use that. My pH with GH nutes went all over the place.
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The Germinator
Well-Known Member
Isn't the fact that ph starts going up or down trying to tell us something to change? More nutes? Less?
Seems using ph perfect nutes would mask problems. Just a thought of my own.
I use gh and the only time I had ph keep rising on me it was trying to tell me more or less nutes. Can't remember without looking at my journal entry's. I have a chart I refer to.
Seems using ph perfect nutes would mask problems. Just a thought of my own.
I use gh and the only time I had ph keep rising on me it was trying to tell me more or less nutes. Can't remember without looking at my journal entry's. I have a chart I refer to.
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- #12
The Germinator
Well-Known Member
Once you understand how to use the nutrients it's smooth sailing any questions I'd be more then happy to try to help answer as well.
Iam sure you've seen this.
I haven't is that sad ?
There is another product out there called nuke juice by flying skulls I believe hope it okay to announce them on here .
Just hunks to consider I know myself I'm looking for simplicity with great results . Only down I have about an nutes is so many things to add. My plan will be to copy pennywise almost lol and do z7 nuke juice cal mag and what ever boosters pk I want . Nuke juice has a ph buffering agent as well to maintain a stable ph range as the plants ness are always changing ..
This is what I've learned in two years less is more .
Scientific
New Member
Iam sure you've seen this.
I think pH is related to the level of nutrients in the reservoir but not a good indicator.
I suspect that the pH Perfect line has more vigorous buffering, but that's a wild guess, and that stuff gets complicated...
I think that chart is interesting but it's a bit too pat and simplified for me--I don't think it's as simple as "if pH is falling and PPMs are rising do X." But having said that, with one hydro grow under my belt, I'm the first to admit I have a lot to learn! (Having a bigger reservoir helps with pH stability was my last big takeaway.)
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- #16
The Germinator
Well-Known Member
One thing I can say for sure for myself is that on my last grow when I started having ph problems I referred to the chart and did what it said and my ph stabilized.
Scientific
New Member
Just shows that everyone has different but similar methods .
