Keep up whit EC 2.0 or lower it?

I also use RDWC for years now and my ec value is always too high at 2,5. Now i'm in week 7/8 flower and my ladies are almost three times as big as yours and i have ec value of 2. Next week i drop to 1,8 and then flush for a week. Your npk ratio is according to Awa max 5-4-10, you don't use P/K 13/14. This is required from week 4 flower. You have to gradually decrease the amount of nitrogen from week 4. I use Canna aqua and the npk ratio is from base feed 3.4/3.7/9.4. From week 4 i use pk and the ratio changes to 3.4/10.2/16.4. (25 ml A/B plus 25 ml PK) And add Cal/mag. In recirculating dwc you also have to add enzymes and the top-feed causes rootrot because the base of the stem remains wet. Ata zym is a good one. Also from Atami. Ps I only have two ladies but usually i have around 200 grams dry per lady. With dimmable 600Whps and 2 weeks veg. Also barney's farm, liberty haze and critical kush.

I would say keep her as it is, I am seeing a little bit of clawing but no major signs of to much or to little. Plants are looking great. Remember when you check the EC check it at the same time every day. When the lights are on it will usually show a lower amount and lights off will be higher. At first sign of anything bad do a full water change and that usually resolves the issue before anything serious arises. Happy Growing