I didn't read the entire thread, but do yourself a favor.. dump the miracle grow. I'd recommend getting some brand of soilless mix that already has perlite and such in it. Sunshine Mix #4, ProEarth, etc.. This is neutral with no nutrients in it. Once you have this, repot your seedlings.. just be gentle in the process. One of the big advantages to soilless mix is you can basically rinse it out during the grow keeping things nice. For pH, run it around 6.0 in veg and take it down to 5.5 once you go into flower. You are right on nutrients for now.. not needed until the seedling is 3-4 weeks and has at least 2 sets of good leaves. Once you do start adding nutrients, try to mix them much weaker than recommended on the bottles. If you can get a meter to measure pH and ppm, do. For ppm's I go with a range of 200 ppm (in early veg) to a max of about 550 ppm in flower. This is much weaker than other folks, but hey it works. Anyway, good luck! Farmer Rich