As a pain patient I really need to know, What are the best pH's for the three stages in the growth cycle?
1. seedling
2. Vegetative
3. pre harvest or hype up resins
Here is a chart that shows the availability of nutrients at different Ph levels. What is good about it specifically is that it differentiates between soil and Hydro
Once you determine exactly what nutrients you want available & at what stage, then you can use the chart to help you understand what the plant is absorbing.