Yepp! They are planted in square 6.8 liters/1.8 gallon pots(4x). I typically cover a 4x4" with one plant and a 3 gallon pot. That leaves me with 7.2 gallons of total volume this run. That's a lot of coir in a 4x4!
Anything above 3 gallon for one plant is just wasting coir.
Cleaned up the lowers leaving better opportunity for the upper parts receiving adequate amount of light to fill out and better the airflow. From bottom to top.
I probably removed most thrips since they mostly want to keep cool and focus on the lower growth.