A real SOG grow is never done with seed's i've seen it been done with seeds it works but not as good from clone, like @TheFertilizer said you got to know the plant.
I've seen SOG's done with Indica & Sativa some Dutch growers have elite clones that are produced just for these type of systems...
That's a system of a Dutch grow they are the best at Sog growing. I could speak all day about sog grows what I think is the best system etc.... ha ha ha
I know a thing or 2 about sog grows, I've been around many growers who have done BIG Sog's never had the balls to-do it my self tho. PICTURE IS NOT MINE
Float that lets around2-3cm of water into the tray.
Cheap and simple and easy to make, Cheaper than the Autopot works the same and very slim chance of it ever over messing up and flooding the tent.
When I was taking the pictures it was running with a 1000LPH pump and was fine so this system...