problem at flowering stage

Hello, what could be the problem ?

250w HPS, 20c Night-25c day Tempature, %45 humidty. AN Bloom A+B 1ML per Liter + 1 ML Carboload per liter. I was thinking magnesium deficiency. Then i tried epsom salt with foilar spray. then it didnt looks work. then i tried AN calmag xtra 1 ML per 5 liter water. it dont work too.

Yeah I thought calmag would have been the answer too. Strange.