Appreciate the translation.
What medium are we growing in here? I grow in soil and never flush, not necessary. Water with some humic/fulvic acids and Catalyst or Blackstrap molasses (teaspoon) only the final weeks of bloom. My soil is nutrient rich and so in general doesn't need much added fertilizer.
Anecdotes from other growers suggest flushing is not necessary in other mediums either. Don't overfeed in the first place; dry slowly and cure properly.
I don't pH any irrigation/fertigation solutions, including for seeds, which I would start in a soil-less mix like SAM#4 with some additional dolomitic lime and Azomite or Excelerite. The pH of the media (more specifically in the root zone or rhizosphere) is of greater concern. The liming agents neutralize acidity long term, providing minerals for plant use.