Me too Ray, I disagree with the use of such concentration units. And also when the amount of fertilizer is expressed in the form: use half or the quarter of what is recommended on the notice.
I am also a chemical engineer having spent 36 years of his life in industry.
Brabantia, if you're asking me, I use K-Lite at 1/4 tsp.
per gallon of rainwater. I use a Spot Shot for fertilizing
my orchids and what goes in the tank is what comes out the nozzle.
I mix 7 gallons of water and use all of it each time I fertilize.
