Definitely BSFL - Be careful! I have been having them in my bins as of late.
I know they can be ok but you DO NOT want them taking over your bins.
They are a very VIGOROUS composter and as a result, generate lots of
heat - too much of which will run your redworms out of town.
I suggest picking the BSFL out of your bin and/or at least keep it to a
manaageable level - believe me they are way too hot and also much more
vigorous composters than RWs.
You can also take some slices of bread soaked in milk and place them on
top of your worm bin and the larvae will come up after the bread - you can
then pick them out and do what you like with them. Leave the bread for
only 2-3 days. If you want BSFL - and they do seem to be beneficial - you
should really consider saving them in their own space. They will simply take
over AND overheat any RW bin. My 2 cents.
There are many, many videos on Youtube about BSFL if you want to know more.
