I don't like feeding small pellets to my monster Bichirs. I prefer feeding tilapia(Bichirs get massive) but sometimes I'm busy. I don't have time to cut up tilapia everyday.Hikari sinking carnivore pellets and sinking cichlid gold works too
Mega is sinking pellets, I think.I haven't used the mega, but I do feed the Ex Large, which are the 7mm pellets.
They float though, so not all bichirs will get to it.
That's my one beef with NLS, all their big pellets float.