Look further down on the chart. There are additives that they recommend at different stages. The ec change is from the additives.
Start by cutting the recommended doses in half. That's where I am at, and the plants love it.
tikiroom Reviewed by tikiroom on . Advanced Nutrients Feed Calculator Why is it that when using the feeding calculator, upon entering different number of weeks (eg. 7, 8, 9) with each additional week added the EC or PPM levels drop, BUT the calculator still tells me to use the exact same quantities of nutrient solution!? For example, for a 7 week plan the calculator says use 78 ml of each of Grow, Micro, Bloom and have an EC level of 1.7 at peak flowering. But when I change that to a 9 week schedule it still says use 78 ml of each of Grow, Micro, Bloom but keep Rating: 5