any advice?

So I found out that indeed my ph levels were way too low, around a 5.0. Spent all weekend flushing and bringing the ph up to around 6.3. So far so good because none of the plants are dead and looking perky. Now, i have AN taruntula, grow big, and superthrive on the way to help out the recover but i believe the plants look like there 2 weeks old rather than a month since they've been growing since aug 19. Any help tips please let me know. 400 watt hps bubblicious grow.

They are small for a month, but no worries... because all you need to do is fix your ph and keep all your variables as far as nutes light air temps ph etc in check and they should fix themselves and begin full growth in a week or two. My first grow was outside in a garbage can half filled with mystery dirt and half cigarette butts and random trash with miracle gro sticks. Harvested a fatty 2 or 3 grams, but the point is they are pretty resilient.