I start at about 200PPM's and increase to about 700PPM's thru veg then increase to about 1250PPM's during the first 5-6 weeks flowering then begin decreasing it the last 3-4 weeks or so back to 700PPm's and then just use a sugardaddy mix for the last week...if that helps but I use a modified RDWC system. so weeks 1-2 200PPM, 3 - 450PPM, 4 - 600 PPM, 5 - 750PPM, 6-7 - 950PPM, 8-10 1250PPM, 11 - 1050 PPM, 12 - 900 PPM, 13 - 700 PPM 14- sugardaddy /harvest (generally speaking). Kinda depends on how the plants like the levels so I try and under do it as opposed to over do it. If there is any deficiencies-the plant will let you know. When I increase sometimes I see extremely minor nute burn on the tips-but then they generally accept it. It's kinda kinda like "on the job training" to figure it out. Maybe I get better results with higher PPM's-don't know - but havent lost a plant yet. I use the ratios on the bottle then dilute until I get the PPM's I'm after...then PH it before it goes in the reservoir.
hope that helps
BBB