EC meter value?

https://bucket.growdiaries.com/static/img/b521991ec33df6f67df178bf4cfc66ac.jpg Funny thing, that image is from grow diaries, lol. Shows the 3 differnet conversion factors as well as mS/cm^3 to EC (which is just moving the decimal 3 spots... That's supposed to be mS/cm^3 not squared. This is about a volume of liquid, not a surface area. ugh i shouldn't have used that image, it has other minor errors too, but the point is 3 different conversion factors with 3 drastically different ppm estimates solely due to the brand of equipment you bought. that equipment measures electrical conductivity, not ppm. The EC reading is +/- 2% or +/-5% that the label says, but not the conversion to PPM. EC is still useful information... but if you want to know what you are feeding in a soilless/hydro context, better to calculate PPM from the gauranteed analysis labels. Also, you get a breakdown per element - N, P, K Ca, Mg, S - the individual concentrations and ratio is what you tweak to fix things, not just overall concentration or EC. Much easier to diagnose problems when you track this stuff. Within 1-2 grows with soilless/hydro methods, should be nearly flawless seed to harvest for vast majority of plants, if systematic about it. Google drive with shared documents: https://drive.google.com/drive/folders/1GvDcurah5FpjZaBuJQSKtsyIP3ZFNNS0 nutrient ppm spreadsheet, STS instructions, VPD table, DLI table, PCR protocols for gender testing, if you want to buy a thermal cycler, lol..... nutrient ppm spreadsheet has instructions in A1 - 'show comment' With liquid nutes, may want to compare one calculation with the website i linked earlier. I use dry fertilizers, so i've never had to use the specific gravity portion and never verified output for that context. Need to know the mass per Liter of your products for a proper ppm calculation with liquid nutes. 'my formula' is not my formula. It's just Jack's, masterblend's, cropsalt's, megacrop's, southern AG's, et al's soilless/hydro formula. These products are based off the same evidence/experience/research. They don't try to re-invent the wheel as a square, lol

The EC value is 1.32 that’s what you see as “1324 µS/cm”. 1000 µS/cm equals EC 1.0, so just divide by 1000. The 229 ppm is the same reading, just converted depending on your meter’s factor (likely 0.5)