Greetings. Your cultivation setup is interesting. In my country, unfortunately, its use by private growers for potentially harmful purposes is prohibited. The temperature in Cuba is ideal for this type of cultivation. As for the change in coloration, it is likely linked to the transition from the initial substrate to the pot; this shift triggers an adaptation process, involving a minor osmotic change and an adjustment of the root zone as it penetrates the new soil. Aquaculture is fascinating—I have been designing irrigation and drainage systems for 22 years, though I have never worked on one for this specific type of crop. I hope to do so one day. Good luck.