no theres no yellowing its just small i thought it might be the ph so i order a ph prob for soil and water.It doesn't have to be bro, plenty of ppl here to help but they need something to work with. Pictures help a lot. Those nutes will get you through veg and most likely flower too, but you could add some bits to help them along.
The main thing is how do they look, are you asking about pH because you have some yellow leaves, brown spots etc etc? If your plants look healthy, then why change anything you are doing, just add and make it better?
Yes, pH is super important-IMHO. A pH pen to test your solution and pH probe for your medium are a very sound investement. For future reference, guessing anything is a recipe for problems to occur. Know your medium, know your pH, know your nutes and try to read your plants, they will tell you with colors how they feel,
I've been there bro, keep the faith.
Dazed..
here it is 13 days old

