The only thing I hate about PMDD is the lack of P (phosphorous) fertilization. The system was developed more than a decade ago, and phosphate at the time was blamed for algae growth. A much better route that I recommend is purchasing the starter pack, it comes with all macros and a micronutrient mix, and follow the EI method dosing. It is completely explained in depth in our planted stickies at the top of forum, and EI can be dosed dry with a grocery store teaspoon set. Much easier than PMDD that needs to be disolved into water first then dosed by dropper, imo.
i completely agree to this and ofcourse tom's post. the only thing is i'd check out the starter pack from greanleef and buy them from aquariumfertilizer.com. you get more bang for your buck and you help support aquarists helping aquarists instead of a commercial endeavor. i also use barr's gh booster and believe whole heartedly in it so i'd pick that up if my gh was real low too. plus i'd also look into your root tab recipe in the sticky too.