In regards to bloom boosters, my personal opinion, let me reiterate, my personal opinion, is that I seem to get smaller flowers when I use it. Yes, the plant will flower more frequently, but smaller.
I believe by using them, you trick the plant to flower, before its ready. I like to keep a constant flow of nutrients, and only add others such as potassium nitrate/epsom salts, when the weather changes, ie; cold/heat, rain/drought.
Yes, I know commercial growers use them, but they also need to have them in flower to be able to sell them. I on the other hand, can wait. I use Southern ag 13-3-16, and feed weekly weakly. Right after I fertilize, I spray them down with Pro Tek. This makes the hardier.
Once a month I flush them out, but this is an old habit, since the fert has no urea based nitrate in it, and a few days later they get seaweed/fish micronutrients.
What I am doing is giving a constant feeding through out their growth cycle. I find I get more vigorous blooms that are larger and last longer, versus forcing them to bloom.
Again, in my opinion (yours may vary)