Often times it seems that people get into trouble by following a few different people's advice- and there results are terrible. Fweedom, I'd suggest you look at the grows that people are doing- and find out if they are following the program they are recommending for you. I would also then look at results- and decide whose methodology appeals most to you- and stick with their advice.
If someone is saying "try biobizz and HF 50/50 with a couple scoops o poop and some perlite" but is growing ebb and flo...
Basically. If you start joes system- and hit a rough patch, don't start gettin advice how to fix it from 10 othe people. Get the advice from joe. Or take advice he agrees with. Pick someomes system that you can actually see is/has worked and follow it. I often times struggle to understand "why" or "how" something works until I actually can see it happen. By duplicating a proven method once, you'll be able to see how and why it works or doesnt in your setup, and be able to tweak to your specification but if you never pick a baseline to measure from youll spend lots of time chasing ec ppm and ph- withoit ever understanding whats happening in your system Good luck man.