There are a number of different hydroponic systems available. The one you have listed is from a company called Crop King. So if you have specific questions, I would recommend you contact the company directly.
In addition, here are some links to books and documents available and a selection of some websites to start with listed below.
Hobby Hydroponics, 2nd edition by Howard Resh
How to Hydroponics, 4th edition by Keith Roberto
Grow Your Own Vegetables without Soil http://edis.ifas.ufl.edu/pdffiles/VH/VH03000.pdf
Nutrient Solution Formulation for Hydroponic Tomatoes in Florida http://edis.ifas.ufl.edu/cv216
Best of luck in your hydroponic endeavors.
Many thanks....I will read and learn.
Have a great day.