My Fastberry leaves are getting more and more yellow. The others don't seem too bad. I noticed some green algae looking stuff on the top of the cocco so I removed that and replaced with new cocco. Also I added a fan around the base of the plants to increase airflow. Some Fastberry roots have also broken through the root mats at the base of the pot and are sitting directly in the water. The roots in the tray look healthy (clear white color). I have also increased the feed of the nutrient solution adding in some Pk13/14. Another problem over the last week or so has been the temps. Where I'm located has been hit with a bit of a cold snap as of late.