I have fed the 6mm NLS Thera A and have had good success with it. My guys are only about 8 1/2" so a bit of a struggle but they get them down.
there has to be a pellet for bichirs that stink less than NLS. I have been avoiding pellets cuz massivores stinked real bad. The only solution to keep the place smelling nice is those plug air fresheners.I think all pellets stink really bad. My family yelled at me for feeding massivore and nls lol. Made the whole house stink.