EC or Electric conductivity. I use my EC meter to gauge how strong my hydroponic solution is. It goes up with the amount of fertilizer I put in the water and I get the same numbers when I put in the same amount. After it rains the fertilizer in my Kratky buckets get diluted and it is reflected on my EC meter. I can add fertilizer to bring the numbers back up to the original strength.My brain is not working today, I have a massive migraine please tell me what is EC again?
However, its not a big thing if I don't add any fertilizer if it rains, because my tomato plants drink about half a 5 gallon bucket of solution a week.
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