Looks like it could be cal mag issue.
I'm using sensi grow, b52, cal mag, voodoo, piranha and great white. My ppm is at about 450-500 (900-1000EC)
With great results.
Get some cal mag xtra, but make sure to cut your grow A a little as it has a higher N rating.
Also I PH mine up to about 6.3-6.4 are you doing the same (if your in soil?) I cant see a diary so I'm not sure what you're growing in.
Hope this helps 🙂