I am pretty much on the same plan as Pipes, once a seed pops I put a drop or 2 of Cal/Max on the rapid rooter or rockwool, not to close but on top,  how is that for vague? The #1 thing to take from Pipes comment is

"I feed a lot of shit to my plants but good shit and I do it slow this way I see if I'm giving to much or I need to give more" 

Coco and water grows are way differnt than soil grows, I soil your plants have to work for their food in hydro they do not, its a 24/7 smorgusboard after a concert. From what I have read it takes a week or more for roots in soil to get to whatever you add and in coco you will probably know tomorrow if you screwed up and over fed the next day and 2 -3 after that if you under fed.  

With the auto feed I feed for a minute each time starting at 3 and if I see run off I drop it down to twice a day and then I increase the cycles until I see run off. I have valves on my hose to restrict the volume but the 1 minute length of time is all in the timer

In the Ebb & Flow I run it 3 times a day for 5-8 minutes.