If you set up your tent 3 days ago im guessing you light schedule has only been going for 3 days?? If so and you adamant this is whats better for you to manage the grow then do it now! Wether its going into extra night cycle or day just do it. But really we need to know how old your plants are...
https://www.rollitup.org/t/new-member-new-grow.876431/
Here is the link to my F&V grow i done last year. This year ive settled for pineapple express and white widow
3-4 Crushed powdered eggshells clean the egg shells put them in the oven for 5mins the crush grind & beat them, poke a hole with a pencil in the soil in put the powder in the lightly water