I am going cross-eyed trying to tell if there are fruit fly larvae on the walls of my continuous brew kombucha. I have seen fruit flies on the outside, but I don't think they can get in through the two towels and rubber band sealing the top.
I assumed that the specks I saw on the walls were just bits of tea and bubbles, but after doing some research I got a little paranoid. I set a trap to deter fruit flies so I'm not worried about more (if any) infiltration, but how can I know if there are fruit flies inside? Would I just have to wait for them to mature and see if I have fruit flies buzzing around inside after some amount of time?
The scoby is seen at the bottom of the picture. There is a distinct line of bubbles. That isn't what I'm worried about; that's normal. What I am concerned with is the specks stuck to the wall that aren't touching the scoby.