That start is simply showing you at what pH your plant most efficently uptakes the proper nutes. You know you start clones your pH is 5.5 for example, and once rooted I see most here shoot for around 5.6-5.8 for rest of grow.

As far as PPM, you increase the PPM as the plants grow it gets more mature and as it is in different phases of its life it requires different nutes. Remember, N makes it grow, P and K are needed for flower/bud. And yes, 1400 ppm is max I have ever seen recommended in video/print material. And, some strains dont even like it that strong apparently. I guess all that comes from growing a particular strain over and over and gettin to know its tweaks.

Here is another chart that might help you understand further.
http://boards.cannabis.com/attachmen...4&d=1121829097


Hope that helps, and next time post in hydro bro.


b0nger