Pineapple EX Fastbuds First Grow

SO this is my first grow :) any help would be greatly appreciated. Been trying to get as much info into my head as i can !! I germinated 4 seeds using the seed soak/paper towel method, all good sprouted in 36 hours or so. Placed seedlings in rockwool cubes, 3 broke surface in 24 hours one never showed up :( I would say want happened the 4th one was my own fault i may have damaged the delicate root while putting it in the cube, lesson learned there. I Placed them under 18/6 light in the tent for 3 days under a humidity dome. 2 of them seem fine but the third one has a very yellow leaf ????? Last nite the 10th i put them in there final home 5 gallon fabric pots, 70/30 mix of coco to perlite. I mixed up BioBizz Root Juice 4ml Acti-vera 4ml Alg-mic 4ml ShoGun Calmag 6ml In 5 liters of water with a ph of 6, I pre soaked the coco and then planted the rockwool cubes. So there in the tent things are happening :) lets see if i can keep these plants happy, again if anyone can give advice i would greatly appreciate it.