Калия и Магния не хватает + основы NPK. В аптеке сульфат магния купи и по листочку дай из пульвика. Может ещё света нехватать, опусти светильник ниже на 30-50 см
it looks like you need micro and bloom added to the nutes its is very important you should at the very least have grow micro and bloom from advanced nutrients so that you plant is getting everything it needs. hope this helps