Yeah, what they said 
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Try amzn yinmik $24. Many here will recommend a more expensive one but they all China shit made probably from same factory lol. You can do a slurry test in soil just so you know there are kits, pretty cheap, that is if you do not want to test runoff.
I don’t test runoff because I bottom feed I just make sure I know what is going in the wick pot.
Also, my meter in us/cm reads for example 1000 but ppm is 500, it has both functions you can check. Some meters will read it as 1 so that’s why you have to multiply that time a 1000 and divide by 2 to get ppm on a 500 scale which is why previous poster said multiply by 500, its the same but wanted to give maybe a better explanation.
PPM is basically 1/2 the us/cm reading.
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Hi, it’s not so much the quality and price of the meter but understanding if the reading via the probe on the ground is the same as the reading via run off. However, I also find myself well in ec since there I use them at work and I’m used to it. Even the table I have of fertilizers Terra Aquatica (ex general hydroponics) it’s in ec. So I probably won’t even do the conversions. Thanks for the contribution 
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Me too, i mix my nutes on the us scale
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@MidwestGuy (and I) told you earlier that they aren’t apt to be the same. But so what? You can measure the runoff’s PPM with the Hanna meter, and its probe will make it easy to get readings from liquids in containers.
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Sure, except that as I wrote above, I am in a physically uncomfortable position and I cannot perform the runoff reading…so the terrain reading was more useful to me. Anyway I will update this post with the results. Have a great weekend 
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Hi everyone, I’m updating you…I found some videos and was lucky enough to find a local grower (obviously vegetables and not what we are looking for 
) who uses this control method.
Before you can measure only the soil EC, you need to understand how the plants are reacting. EC measured in soil will be different from the run off. At the bottom as you already know more salts settle, so the reading the run off will show a higher value than the one verified directly in the soil. Once you understand the difference between the two values, you can use the run off method less. However, you should test the run off every now and then, so as not to find any strange surprises.
I finally bought a normal ec meter, changed the position of the grow and will check like this for now. If something decent comes out maybe I will post some photos. Thanks to those who contributed:oncoming_fist:t2:.