I changed to 12/12 yesturday, and i noticed my plants stems are getting very soft... I do not use any nutes, i do not have a fan, but before 12/12 the stems used to be hard like rock literally, it's special queen #1 from RQS and it's my first grow, i wanted to try to grow for fun, so i got one of my friends seeds... I do not have any growing equipment other than 2x 18W fluorescent tubes... Any help would be much appreciated