Double Grape Indoor Soil Grow 4x

Big week! Nothing but standard growth happened for the first 10 days of being in the tent after transplant. Watering whenever topsoil was dry, which started at about once every other day and is now about once every 24-36 hours. Also added a couple clip on fans in the tent to improve airflow. HOWEVER, on day 18 plant #2 started to get some light intervenal chlorosis and by day 19 plants 1,2,4 were showing signs of this as well. Plant 3 did not appear to have any signs of IC, but the lower leaves were curling at the edges slightly and I could see some slight yellowing around leaf edges as well. IN RESPONSE, I moved the light up to a more recommended height, reduced the intensity slightly, and will be watering without nutes (tap water + pH down solution to hit about 6.5). My current hypothesis is a combination of some light stress + nute burn since the soil I am using is organic and partially compost based, so it likely contains everything the girls need. Looking back, definitely should have just given pH balanced water with how nutrient rich this soil already is. No need for super juiced plants on my first grow. Plenty of time for that :) #1 is still a bit smaller (one node fewer than 2&3, two less than 4), but the other 3 are really coming along will likely push out another node or two this week. Then it's time to think about topping!