Purple Haze - First Grow

Hey hey! So my first week of proper seedling growth felt like it lasted forever! I feel like I definitely overwatered them in the germination phase and for the first few days of being seedlings, dialled it back a bit by giving them an extra day to dry out and they seemed to react well and have a bit of a growth spurt. Note for next grow: When transplanting cubes plant them a bit deeper in the soil, as once you water them the soil compresses causing them to poke out a bit! Also noticed a slight bit of green algae on one of the cubes, just picked it off and covered with soil to hide from light. Measured the PH of my tap water and was surprised to see that it was measuring 8.5, whereas previously it was around 6.5 - 7. Checked online and supposedly I do have very soft water, so i'm guessing this was just an anomaly. Anyway, readings for this water were: Tap: 8.5 Mixed with some Calmag due to my soft water + PH down to balance it: 6.3 Runoff: 5.5 Was surprised by the runoff being so low, going to mix in a slightly higher PH for tomorrows watering (maybe around 6.8~) and see how the runoff turns out. Overall pretty pleased and finding growing SUPER satisfying! It's turning out to be an amazing hobby.