That comes out to 600ppm (1.2 EC), and is what I'm using start to finish. Works great, and the stock solution is incredibly easy to use. FWIW, on rare occasions I've used 12ml of each to reach about 720ppm.
It will vary some because of measuring error or stuff in your water. To get what I posted I used air distilled water and a measuring flask. But the solution I mixed varies with how much water I make the mix with. I use a gallon jug so it will vary in strength.
But it will be between what the two of us have listed above.