I grow with the same soil/nute system and have had some good success with it. You still have to be sure the Ph of the nute solution you are putting in is in the 6.5 range. If you are adding high Ph solutions, eventually the soil Ph will climb as well.

You need to know the Ph of your source water as well. I was able to mix my solution by the gallon with my tapwater and add 1ml Ph down to the mix and it came in at 6.5 consistantly. Your recipe may be different, just offering one example.

You still never replied with how much/often you are watering. I used the same size pots as in the picture and was watering about every third to fourth day. I also didn't do much feeding in veg, the All-Mix is fairly well fortified for young plants. I fed the hell out of em in flower, but that's another chapter.

Best of luck.