I use automation heres how it happens
this is for hydrocorn or 3/8 gravel Bloom cycle
pump comes on 1 hour after the light come on for 20 minutes
, than mid day, than 1 hour before the lights go out.
The growing cycle is in 25/75 vermiculite/perlite
They get 20 minutes 1 hour after the lights go on.
It takes about 3 days for the plants to tell you if its ok.
The real bottom line is to keep track of the ppm and ph of the system. The bigger the resivore the better, and always go slow when changing the ph and ppm.
ALWAYS REMEMBER IF ANYTHING GOES WRONG FLUSH THE HELL OUT OF THEM. They will even grow in just tap water. Automation makes it easy from the internet.
A person with one seed knows it all a person with a 1000 plants want to know more.