OK so I guess I will put my input on here finally ( I thought this was a dead thread lol)..but hello good farmers on here new to this site.
So I've been using black label since 2012 and have used it as my main nutrient line since then, yes I will say it took a run or two to dial it in but it was smooth sailing after that. A little on my back ground I have been in the hydroponic industry for almost 10 years now, lived on the west coast for quite some time and moved back to the east coast and became a manager of a hydroponic store. In my quest I have used almost every nutrient line out there except really only
heavy 16( which I hear good things about). And out of those I will say as far as a simple nutrient line black label is my favorite. It's very user friendly, clean and stable. I of course add other additives in there as far as my own preference of solid products I've used over the years but black label is always my base line. I run it in a coco top feed drain to waste with e papillon lighting and clear 2.5 a light almost every time now, when I use my regular single ended I still am able to achieve 2.0 per light. I will tell you when running it in coco you still have to add a cal mag supplement. You can't get around it. My favorite about the line is that I can run it really low and still have great results I'm never over 1000 ppms and I mean ever, it does not play well with tap water RO water is a must with it. Black label is not made by gh at all I know the owner of the company and it is the same guys who previously owned CAP and quantum. It is a good nutrient line to venture into and I just realized that I wrote a novel ( my apologies). I will leave it at that and if you have any questions feel free. Thank you for your time every one.