G13 Haze balcony grow

Week starting 06/09/2019. All the G13 Haze plants are still in trouble with the one in the smallest pot having lost a lot of its leaves and continues daily. The White Widow does not show any major issues. A few pale leaves but would seem normal at this stage of flowering. Feeding every second watering with pH at 5.8 to continue lowering the soil pH (if that is possible) - run off measured at 6.2. Currently the soil pH is just under 7 using a soil pH meter - it has taken 3 weeks of using water under pH 6 to bring it down from 8 to 7. Notes #1 - 14/09 - plain water pH5.8 #2 - 15/09 - 20ml/5L pH5.5 #3 - 14/09 - plain water #4 - 15/09 - 20ml/5L #1,#2,#3,#4 - 20ml/5L of Vega to address the Nitrogen deficiency issue. pH 6.2. Runoff measured at 6.2 with digital pH meter. Soil meter measurements (before and after this feed) are shown in pictures. 19/09 - #1, #3 - 20ml/5L Flores at ph6.3. Runoff measured at pH6.1 - Soil meter measurements (after this feed) are shown in pictures on 19/09