Eel's 1st indoor grow- Meph White Crack

So after not growing anything for over 10 years(moved away from my home country, back then I had grown twice outdoors) I gave it a shot because the opportunity arose to do so this past summer(2018). Did so outdoors and fell in love with it even though I made so many mistakes. Learned from them though. After the season passed I knew I wanted to continue so here we are! First time ever trying this indoor growing! So far so good, Had to lower the light from 90 cm to 63cm to stop the seedlings from stretching on Day 1. First time indoor grow so first ime using a grow light, have to get used to it. But so far so good on day 3. Soil is Biobizz Light mix all the way through, will start adding some BioCanna Rhizotonic(seaweed extract for stimulating root growth) and maybe some Aptus Regulator(has a bit of magnesium and helps regulate the uptake of nutrients) around days 7-10. I'm using the regulator as my tap water has some calcium but is pretty high with PH at 7.7; but the soil has a PH of 6.2 and acts as a buffer. The BioCanna product line later down the line should also regulate the PH of the watering solution. I'm not sure but I think this should be enough not to warrant the use of a PH down solution. Going to be adding a tiny layer more of soil sooner or later(realized it was a bit too low around the edges and the water easily leaks out the first few holes(actually realized that when I wet the soil before planting the seeds, but failed to add more soil(I was high)). Also, I noticed I couldn't choose White Crack(mephisto) as a strain for my grow. Is there a specific reason it's not listed? If not, would the responsible people please add it? 😜 Just a pet peeve. 😅 Summary Week 1: Not as much growth as I had hoped for but I can't really complain. Am getting a small heater to up the temperature a few degrees. Also added first bit of Nutrients on Day 7: a few drops of Aptus Regulator and about 2.5ml/liter BioCanna Rhizotonic.