That would be it. You do not have to use bloom booster additive, if you are using a bloom base nutrient, to get excellent bud. I only make the recommendation to push them even further. If you do get the monopotassium phosphate, seriously no more than 1/8-1/4 teaspoon per gallon. It is super strong stuff. I also recommend it because it does not bother other nutrients you use. It is a very clean and stable chemical.Is this the type of product you mentioned?
: POTASSIUM PHOSPHATE MONOBASIC, Biotechnology Grade. Min. 99.5%
PPM666