What's more important EC or PPM?
- Thread starter Cigarz
- Start date
BobThe420Builder
Well-Known Member
They are the same thing, just a different way to measure it
Tracker
Well-Known Member
The ppm value your meter tells you is a derived value based on the electrical conductivity EC of the solution. EC is a more direct measurement of the ability of the solution to conduct electric current.
Different manufacturers use different scale factors to convert the EC measurement to ppm. You need more info on the specifications of your meter to know whats going on there.
Different manufacturers use different scale factors to convert the EC measurement to ppm. You need more info on the specifications of your meter to know whats going on there.
lusidghost
Well-Known Member
800 is hot for a vegging plant. What do you mean you can’t get it higher than 500?
edit: never mind. I understand what you mean. You can’t get it higher within that EC range.
edit: never mind. I understand what you mean. You can’t get it higher within that EC range.
Cigarz
Active Member
Yes... which is why I ask whats more important, PPM or EC? I can't have both, my nutrients require EC of 1-1.7 but in order to reach that PPM won't go above 500... So what do I do to correct this? or I cant do anything?
From what I'm reading 700-800 is best PPM for veg? and 1000+ for flower. 600 or so for seedlings/clones. No way I can hit anywhere near 700-800 ppm with a EC of 1-1.7.
Which is more important and which should I go by?
Cigarz
Active Member
Not sure, this is the one I got.
Amazon.com: Water Quality Tester, Accurate and Reliable, HoneForest TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc.: Home Improvement
Buy Water Quality Tester, Accurate and Reliable, HoneForest TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc.: Turbidity Meters - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
IT does PPM, and uS/mS and Temperature. It reads around 800 on the uS/mS side and around 400-500PPM on the PPM side. so I'm confused now lol
BobThe420Builder
Well-Known Member
Again
It's the same thing
Ec is calculated by ppm, just depends on what scale u use
It's the same thing
Ec is calculated by ppm, just depends on what scale u use
Cigarz
Active Member
I gather that, how do I figure out what scale to use? why does the meter have both PPM and EC if it's the same thing?
twentyeight.threefive
Well-Known Member
I don't think you are understanding the basics. ppm = EC. It's just a different scale. Like celsius and fahrenheit. 0 C = 32 F. 500 ppm = 1 EC on 500 scale. There is also a 700ppm scale but most readers are 500 scale.
twentyeight.threefive
Well-Known Member
You have to reference the meter you purchased for what ppm scale it reads. Why have a thermometer that reads C and F. I generally never reference ppm, for my growing needs I measure everything in EC, it's universal.
Cigarz
Active Member
If this is the case then why @ 1.6-1.7EC it reads around 400PPM and not 900? Is that because it uses .5 instead of .7? This is what confuses me.
BobThe420Builder
Well-Known Member
What he said
Lol
Lol
twentyeight.threefive
Well-Known Member
You'd have to share a picture of both readings. If one says 1.6 EC then it's either 800ppm, 1024ppm, or 1120 ppm. If it's none of those it either needs to be calibrated or returned if it can't be calibrated.
Cigarz
Active Member
It comes precalibrated and its brand new, here brb.
BobThe420Builder
Well-Known Member
There ya go
Math works
Math works
Cigarz
Active Member
I'm terrible at math which could be a big reason why I'm dumb to this lol so what am I missing in calculating this? What should I go by then? EC or PPM? OR should I test both and use maths?
BobThe420Builder
Well-Known Member
Seriously dude
They are the same...lol
Pick one and use it
They are the same...lol
Pick one and use it