No i have those shitty capsule thinges the ph is between 6.0 and 6.5 but i dont really know if that is correct.The yellowing must be from ph or ventaltion.I am using soil and am currently ordering some worm casting,dolimite lime,perlite,vermiculite,and fox farms ocean forest mix.I had lots of that fox farms but i had to put it in my veg garden outside.This cant be a nute difence i had to buy pre fertilized soil and its 5.5.10 so its not the nitrogen atleast i dont think it is.Also i was way overwatering the leaves are not drooping as much.Keep in mind the space im using is no were nere adequate.Like i said im building a grow box.Please keep the info coming this is my first time trying indoors.Ive read tons and tons before evan thinking about growing indoors but i will run into problems.practice makes perfect:thumbsup: