Well according to my biobizz schedule you should still be using biogrow alongside bloom and topmax. I think they all work together and one without the other doesn't really have the same affect. Make sure your ph is in the safe range 5.8-6.8 no higher + no lower. They look healthy, they look good, they're getting enough light. Maybe overwatering? But I suggest just adding the biogrow at like 3ml p litre and upping the bloom and top by 1ml. 🌱👍