40B, lots of smaller tetras, a pleco, a pearl gourami....Yah... I see the videos and write-ups. Looks simple but I'm scared I'll screw it up and dead fish arrive. Especially with the types of bags. Confused on that part.
What size of tank is it and what is in the tank?
I'm sure, as long as all the inhabitants are fairly small and peaceful, they won't pick at the gudgeons and the gudgeons won't go at them. BUT they may do chasing and flaring (depending on what size of fish you have and their tempermant)