First Grow Ever - CKS WW Auto

Day 9 got the new light! So bright wow! And not purple! Haha. Not much new growth since day 6, We'll see how they like this light. One of the girls has 2 small brown spots, what could that be? Calcium deficiencie? Recalibrated my PH meter, was quite a bit off. Was reading 7.3 when it should have been reading 6.86. I think that's why the girls have been growing slowly and that would explain the brown spots on one of the girls. Day 11 did the first feeding last night. Very little growth in the past few days but definitely some! Also made some homemade CO2 generators on a recommendation from a friend. Just yeast, sugar and water! Seems to be working so far. I only put one on 3 out of the 4 plants so we'll see what happens if anything haha. Day 12 They're starting to pick up speed! They love this new light.