I never found exactly what seeds u are sprouting...photos? Autos?
Soak seed. Place taproot down in a rapid rooter. Leave in the dark alone. Once popped
I sould start them out under some 6500k cfls like 3 inches under. Let grow about 3 nodes and place under the HID. Once she gets 5 or 6 nodes, top her. Secure ur base and then tie down to get more mains. Top them too. Keep low and let veg for 8 weeks and man oh Man U will have a qp at least. I only keep two photos at a time but only if I have too. More light less plant big yeild. Nutes...easy on em. The less the better. Don't give but teeny amount when first set of serrated leaves are seen. As she grows, up your nutes. Unless u are using doc farms ocean soil then u do as I had said and Kevin said...add half 0.5-0.0-0.0 top soil perlite dolomite lime PELLETIZED only and some hydrogaurd to keep those organisms happy. Run water thru pre plant to activate lime so your ph won't be too low. If u check runoff and is too high or low u can add some ph to next water. Water as much as u want when totally dry. Give 5 days between waters if using big pot. Smart pots are good buckets are good just drill lots of holes. Never transplant in flower. Defol with care.
Autos, place in rapid rooter then in activated dried pre mixed soil and only water around the seeding to keep from drowning. 3 gallons great u good yeilds. I add bud candy or Koolbloom towards the end then flush. GOOD LUCK!!