Hesi pH Down Bloom contains 59% Phosphoric acid solution.
To avoid adding more nitrogen during the flower phase Hesi provide a pH Down just for the Bloom phase with only phosphoric acid, so only adding phosphorus.
Hesi pH Corrector pH Minus Growth, pH minus Bloom and pH Plus corrects the pH value of food solutions for plants on hydro and coco. For cultivation with hydro and coco it is necessary that the feeding water is set to a certain pH-value. This pH range is around pH 6 (5.8 – 6.2). Small deviations above or below this value are still acceptable. The reason for this is that the feeding water determines the root environment because the hydroponic mediums are neutral and only give support to the roots, they cannot store the nutrient particles. For soil this is different, since it is able to store the nutrients and distribute them to the plant over several days, during which the pH value in the soil itself decreases. The feeding water for hydro and coco cultivation however actually runs along the roots and must at this point contain all substances in the proper concentration required by the plant. That is also why the pH-value must be optimal at the moment of feeding, in order to be able to absorb all nutrients maximally. If the pH is much lower, the roots could be damaged. If the pH is much higher, the plant can no longer absorb all nutritional components.
Supplier source: https://erithhorticulture.com/product/ph-minus-bloom-1l/
