<span class="link_user">@Mia_BIOTABS</span>, You should start measuring your daily light intake (DLI) at canopy - get photone on your phone, it's life-changing. This grow is lanky and thin because it hasn't had enough lights and you haven't really trained it. No judgment from me by the way, we're all learning.
I also run SF-1000 and it's more than enough for a 19L plant (see my diaries) if you get the distance from plant and intensity right -- just tune everything towards the DLI.
This stuff is silly expensive but I think I'll be getting more of it. I don't have enough of a baseline for a run without it. Maybe one day when I run two pots!
No complaints about these homebrand nutrients, they've lasted me 4.5 runs with autos though the vege cycles are too short to get maximum use out of them.