I have one question that is intriguing me.
I inserted 1ml of CalMag and 2ml of Biogrow in 1L of water as mentioned on the label of each recipient. The EC was 2mS/cm2. I fed the plants, in soil, with that mix and the EC of the runoff was 3,8mS/cm2. Looks like a massive increase of EC.
Can you help me with that?
Thank you guys.
@bs_monteiro It means you're over feeding mate. You should flush to bring the EC of the medium down a bit and feed less next time 
"Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.”
― Mark Twain
@macky I just flushed and the EC decreased to 1,2. Do you think it's enough or it should be lower?
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