I never feed anything but tap water(ppm less than 100) until at least 2 weeks old. Then yeah maybe 50% of the Lucas Formula. I have the same GH 3 part Flora Gro-Micro-Bloom as you but I bout a tub of the Maxibloom powder and just go by the lucas formula in the link above. Works great mate. I also add about 1 ML Cal-Mag. Don't know if it helps or why, but it doesn't hurt anything. I also have to PH up before feeding. The PH is very low and I'm adding just under 1 ml of PH up every time. It Just works man. No headaches. Yeah I pinch dead leaves every once in a while, but I've done DWC, soil, HEMPY etc. and I always do that.
It's just easy man.