Seedling feeds?

[nefrella]

@George

If we would all use ppm’s that “translation” problems would disappear for good, 100 ppm are the same in Sidney, Berlin and Alaska

True, but which ppm method : hanna .1 = 50ppm, eutech .1 = 64ppm or truncheon .1= 70 ppm is the baseline? Do you just pick one and hope for the best?