Hi peeps
What ppm should distilled water have?
Will use it to calibrate my PH pen.
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Distilled should have 0 PPM. It should be pure water.
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Ok, thanks.
I’m trying to make it myself since I haven’t found anyone able to deliver it in a fairly short time (I need it ASAP as my mother plant is dying)
I use a steel pot and steam cleaner to make it, but the first measurement show 17ppm, and my tap water is 25ppm.
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Not sure about making it yourself… you can find it at any Walmart or grocery store.
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Alright, will do some more research 
Will the ph pen calibration be way off if I use 17ppm water?
25PPM for tap water is quite low.
Are you trying to calibrate an EC/PPM pen or a PH pen?
Using distilled water for calibration of a PH pen is not normally recommended. It is very PH unstable. The only case that I have seen where the manufacturer suggests the use of distilled water for PH calibration is for the super-cheap Chinese models. While inexpensive, those have caused nothing but difficulties.
Distilled water is sometimes used to rinse the probe prior to using a calibration solution. E.g. buffered PH 7 cal solution used for single point calibration. Or, multiple cal solutions (4,7,10) for pens with multi-point calibration. And, never use distilled water for storage of a PH pen.
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@Northern_Loki I’m trying to calibrate an cheap ph pen. I have the 4.0 and 6.86 buffer, but lack proper water to dissolve it in.
I’m educating my at the moment
Also, I have a TDS pen. So I guess I’m way off regarding my earlier measurements where I believed the TDS pen measured ppm ?! 
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I just bought a gal. of distilled water. I needed a “clean” jug for a comprehensive analysis of my well water. I tested the DH2O for the hell of it… 7.2 pH, .453 EC. I’ve tested WallyWorld’s DH2O too, 8.4 pH. You never know what you’ll get.
As I understand it, TDS is displayed as ppm. But it’s based on EC (electrical conductivity). Each mfrs. pen has a built-in factor to convert EC to ppm. $.02
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Yeah it should be at the grocery store with the water in a gallon jug for about $1.
One thing I was going to try next time I wish I had done before was to mix the buffer solution and keep it in a jar. Just use a little at a time to calibrate and keep the rest for later calibrationsđź‘Ť
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@Hashtree Yeah, keep them in two bottles, and use it when needed.
I’m getting ph-strips later today. I hope it not too late…
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Is it to Mutch wather or is it to Mutch food or to warm??? Panik atack now whan 50 % of the plants look like this .pleas someone
Exactly.
I use pint jars…
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