Adopting Eleven Roses week 1 flower

OK guys week 2 veg I did my research (I'm a first timer) and realized I should have done a bit of lollipopping below the main canopy. So, a bit late but I cleared the big fan leaves and a lot of flower growth that was tiny on the branches below the scrog net. I've noticed these are yellowing a lot in the middle so I'm gonna try lowering the nutrients on 1 and not on the other to assess the situation. (I'm using bionova PK 13-14 and Superbloom as per their guidelines for ml/liter). Usually I water once a week with additives and the rest of the time with clean water 180ppm at 20°C. PH should be 6.50 but am not 100% as my pH meter broke and am waiting for a new one. Any comments or advice would be appreciated!