Plant growth stages

Ok, so i'm planning on using the General Hydroponics Keep it Simple Recirculating Program with my ebb and flow system. For my feed schedule, I'm wondering about the average time each one of these stages will last...

1. Seedling
2. Mild Growth
3. Growth
4. Aggressive Growth
5. Transition
6. Bloom
7. Aggressive Bloom
8. Ripen

This is my first shot at hydro, so I would love to have your help.

Thanks.

each stage is up to you and the stock you grow. I cut clones which take 3-5 days to root then I veg for 12 days which gets me to about 14-16 inches then I go 12/12 for 5 weeks then harvest in my aeroponic grows.Depends on your strain and room you have to grow

Ok I guess this question is for people who have done the GH feed schedule...

Each of these 8 stages of growth calls for different nutrient mixtures.

So how do I determine when to replace each nutrient mix with a stronger one?

Filthy is right - you control all those stages. i use the Keep It Simple - Drain to waste - which is very similar.

1. Seedling <- No nutes
2.Growth, Mild or Aggressive <- up to you depends on the how much nutes you use
3. Transition <- the first two weeks of 12/12
4. Bloom, Aggressive <- once again - up to you -
5. Ripen <- last 2-4 weeks of growth
6. Flush <- the last week before harvest

There isn't an aggressive bloom or grow stage - that is G.H. terminology. The idea is you start the stage with a light hand and gradually increase the nutrients. you can call it the "aggressive" growth stage but it is the same thing as saying - later in the growth stage - does that make sense?

if you are using RO water you can follow the schedule pretty closely. If you are using tap water with a PPM over 200 - cut all nute measurements in half.

Here is a great link from Earl all about PPM/pH and how to feed:
CC Hydro 101 by Earl - Cannabis Culture Forums

how long do each stage take ?