I cut them waaaay down to a miniscule fraction, and still pull giant yields. One 1 L bottle of both A&B will last my 5x10 garden 6 months, maybe more. I usually try and keep my A&B PPM's between 600-800PPM's and complete formula PPM's between 1200-1400PPM. 1400 is way over strength for my garden, but when I start getting down to the bottom of a bottle I start getting impatient. I have a whole fucking box of this shit laying around, and I need to use it before it spoils. I usually try and finish up a plant around 1250ppm, that is my usual goal by the end of flower. All these examples are for flowering btw. I got a bunch of free Mother Plant A&B formula, so I use that on all my vegging plants with Roots Excelurator, Algen Extract, and then sometimes a few other products from other manufacturers (Thrive Alive B1, Liquid Karma, Sweet Raw) and I pretty much follow the dosing by what my grow bible says, and they never see more than 800PPM during veg, even if they are huge.