I needed a bigger reservoir, runoff catchment, and dehumidifier drain bucket because I had to go out of town for 5 days. Fortunately I calculated the volumes accurately and so when I got home I had at least another 24 hours of solution in the rez, and space in the runoff and dehumidifier catchment buckets.
The other fortunate thing is that I came home to very happy and vigorously growing plants. The tallest colas are now 30 inches above the coco, and 20 inches from the light. There is one cola (pictured) whose stem is as thick as a sharpie!
I ran out of the AN base nutrients and decided to switch over to GHE because the PH perfect buffers in the Advanced Nutrients line have been a huge pain in the ass. Also, I decided to mix my own bloom booster from Potassium Sulphate (0-0-53), Monopotassium Phosphate (0-52-34), and Epsom Salt after finding a DIY recipe (https://www.thcfarmer.com/threads/diy-hammerhead-confusions.47992/) to achieve a (0-9-18) NPK ratio. Significantly cheaper, but will be interesting to see what the results are in the end.
I will be doing one more heavy defoliation on day 21 of flower because there are so many fan leaves laying on top of each other that its hard to keep the humidity down. Stay tuned!