Ec rising in hydro (6th week flowering - closed circuit tank and drip)

Hey bro I just checked out your journal, most importantly, how are the roots doing? I did a dwc grow a year ago (my first diary on this site) where I got root rot which gave me random symptoms that were not easy to diagnose but I basically had to cut the plant down... How is your water res after a few days? Any foam on top or slime on the edges? Do your roots feel normal or slimey? If your roots have problems I recommend starting again unfortunately there is no good repair solution. It looks like your plants have been on the border of overfeeding the entire grow, I found in dwc it is better to feed a bit less then when the plants go light green to increase the feed, then they are super responsive to the increase of nutrients. I got root rot from using plagron power roots nutrient, which is supposed to be ok for hydro but did not work in dwc (in nft it did work well). I hope this helps you

In hydroponics when the ec rises, reduce feed. When the ec lowers increase feed

Usually I find it's when I have fucked up and over fed and had toxicity. Tried all sorts to remedy but with no success.