my powder koolbloom is 2-45-28 and that is just the bloom enhancer for the last 3-4 weeks of bloom. it's all about the quantities that you use.
i also have bloombastic that i can use instead of the koolbloom. its levels are 0-20-21. beastie bloom from foxfarm is 0-50-30. all of these are safe to add on top of your normal bloom nutes without cutting them down at all.
go check out the NPK levels on any bloom enhancer and you will see that they all have ratios like this. try research before you dish out advice dubsfan.