i noticed signs on two plants leaves that i think was about pH floating in the substrate; pH was at 7.5
so i push-down the pH of the solution
the little one drunk a little minus of the others
@KalashnikovBotanist, thank you very much!!
thoose buds are polyploide but i have no ideas how they come out.
If you look the 11th week you can see how looks that type of buds before the harvest. 😉