I’m not sure of your nutrients, and what the make up is all together. Do you mean General Hydroponics Bloom?
I use the Lucas formula, there are various versions of it with various nutrient lines, but I keep it simple with GH Flora Nova Bloom. I don’t play around with trying to boost this nutrient here or there, and I always get 1lbd plants in a area just larger than a square meter. I just K.I.S.S., keep it simple stoner, with the Lucas formula/method steady and true the whole grow, with only a little flushing at the last week of flower. Lucas doesn’t even really believe in flushing at all.
Also I run DWC hydro, so when I flush, everything is gone and I’m starting from scratch as well.
After the media has had a chance to nearly dry, if I were growing in something like coco coir, or a soil like medium(DWC Hydroton doesn’t need to “dry”, it doesn’t really hold water at all and DWC roots in the reservoir can’t really get waterlogged as long as the temps and aeration are good), so as to let the roots recover and not get waterlogged from all the flushing, I would feed with my Lucas formula for the grow period they are in, and in Lucas formula, that would include a balanced and low dose of at least every nutrient, including nitrogen. Google Lucas Formula for details, I’m sure it can even be used especially well with the marijuana booster line.