I used 1.25g per gallon and cut the base nutrients in half. (I was following the
Useless schedule. I did half that schedule when I used KB.). It didn't hurt the plants. But, I don't know if it helped either. I used liquid at 1-5ml/gal (starting at 1, working my way up to 4 or 5, then stopped, and did powdered 1-2 times at the end).
You know, you can buy something like Grow More Hula Bloom (or Hawaiian Bud & Bloom) for much less -- and still have more than you'll use in your lifetime. I switched from GH to Grow More Sea Grow. When I did, I was curious about the NPK ratios I used with GH, how close I would be using GM. I created this
spreadsheet to do that. What's kind of cool about that, is you can see what your NPK ratio would be using Koolbloom (or any "booster") and fiddle with other products to get the same result.
For me, it was kind of eye opening to break away from a themed schedule and do something more plug-and-play. Instead of "collect 'em all" you can use whatever you have on hand. You own your own ratios, they're not abstracted by colored bottles. You use whatever products you want to achieve the ratios you know work for you.
It was interesting to see the actual ratios I was creating with GH. They're not very complicated. Easy to hit with other products.