Ok, first: I am very happy with that girls. They all grow such nice and beautiful and the red one is stunning, such a beautiful color mix now.
They got defoliated in their lower area and after adding some living organics the soil-coco mix showed up lots of mycelium on top of the soil.
That stretch was more than I expected but it is within my space for now.
about "big fruits":
-fructification can be raised by 25% thanks to the higher auxin production in the bud tips when added regulary
-higher yields and a clearly better aroma are guaranteed
-the plants are less vulnerable to pests due to the naturally obtained essential oils
-supplies plants with small amounts of root stimulant until the end of the flowering phase
-strengthens cell stability, which leads to more compact buds
-raises the plants heat resistance