RQS Cookies Gelato hydro to soil

Plant growth seemed to have decreased, soil (61) and night temps (~65) were too low now that cold winter weather has set in. Put a small space heater into grow chamber keeps temps at 75-78 now. Increased nutrient solution to 900ppm. Clones that stalled out taken during first week of flower have finally snapped back, although one seems weak. The vigorous one will be kept for a mother. This plant has endured a lot of abuse so I felt keeping a clone was a good way to pay homage to such a resilient phenotype. Ive included a pic of the 50 watt LED flood light i use for seedlings and veg.