Increased air flow of any kind around your buckets is a good thing. Not just for the roots, but for the beneficial microbes that are in your soil that need oxygen.
Also, leaving the buckets to sit and soak up the drainage water can cause a myriad of problems. Mold on the roots, most often looks like a brown slime. You mess up your wet/dry cycle by having the lower few inches of dirt taking extra time to dry, even though the top layers are dry. You change ph in part of the bucket, meaning you can get partial lock out. The list just goes on and on.
In the end, healthy roots equal a healthy plant.
6.2 as your ph drop after adding feed doesn't leave much room for drift, as it's already on the high side. I would try to get it to at least 6.0, as low as 5.8, so you have plenty of range available without teasing that lock out zone.
I also want to add that it looks like there's touches of purple on the BP start already. If so, that's from mom.
Sorry for the book, keep up the great work.
