have questions about new equipment to my existing greenhouse

[organicbasil]

I have a existing traditional soil greenhouse, recently got a six hose pump and a aerator and a reservoir. So I believe I have almost all the equipment I just need some advice as to how to set it all up.
Here are some questions
1. explain the mixture of the nutrient solution what is the ratio of water to mix and other then ph and ppm what else has to be monitered.
2. what is the preferred ph
3. does aerator need to bubble through the solution at all times.
4. how many times a day should the pump turn on the water the roots.
5. how much solution should be pumped through each time.
6.what is the life span of the nutrient solution. how long until it needs to be changed.

thats all I can think of to ask but feel free to include anything I may have forgot to ask thanks so much