Hello,
Iam nut sure but I think they looks like they look because of too much nutrition and too mutch light. Iam now dimming the light at 75% and put the distance to 35cm.
Also, I stopped give them Biobizz, just Water at PH 6,3.
F this Shit, next run I will try only 1/8 Biobizz, light at between 15-75 % and more distance.
Interesting is miss Frosty, she looks very healthy, thats the reason why I think the light was to mutch.