im having troubles in the start from seed til it´s getting big in veg state

im having troubles in the start from seed til it´s getting big in veg state, it´s so slow grow phase, i used a tray with plastic cover over to get humidify up, 12 days later the third leaves started showing and i transplanted it into 4 gallon pot with 40l air per minute pump. Still going slow, anyone has any good ideas that might improve the quality of the grow and also speed up the process?

Thank you in advance

from Hydroponics / Aeroponics https://www.rollitup.org/t/im-having-troubles-in-the-start-from-seed-til-it-s-getting-big-in-veg-state.1016778/