Well I am surprised the MG statement didn't get questioned. It is because they are not consistent in the mix and it can cause problems if you get one of the unmixed bags with too much nutes.

With the Ocean Forest, I don't think you need to give any nutes for at least 3 weeks in a correctly sized pot. Longer if the pot is larger.

Seriously I find I stress my plants more by giving extra nutes. Ocean Forest is awesome medium. I do give some nutes, but more to cure deficiencies and to fatten buds in the last 2 weeks.

Ya, when you can afford it, get a bigger light system. Next grow let them get bigger before the 12/12. Not sure but changing back now could stress them....are they seedlngs or clonelings? Clonelings will do fine at such a small size, I would worry if seed, they are not identified as male or female for sure at that size.