It's pretty early into the flowering stage, 3 weeks and I have some yellow leaves on the bottom of my plants. I chalked this up to the fact that they were in the flowering stage however I'm not so sure anymore. Is this normal for the pH to be this low after watering? I checked the pH immediately after watering and then these pictures are from approximately 3 hours after watering. The pH of the soil is roughly 6.8-7 when the soil is dry. I use tap water which pH is about 6.5-6.7 roughly. I have been using Cal Mag and tiger bloom alternating on watering. Not every plant registers the same pH.