Thanks for your reply! The feeder fish that live inside the Arapaima's tank are the ones currently eating the sticks, so there's no need to remove any un-eaten since there's none haha. I really hope I'll be able to make this baby monster grow! So far it looks very healthy and it's eating like a pig. I'll keep you guys updated.Start offering pellets every day even if he refuses, remove the uneaten after a while ...hell figure it out eventually... Most young pima die because they are not fed enough. They have a very fast metabolism at this size and thats y some consider them fragile. My pair accepted sinking pellets immediatly and id feed them 2-3 times a day. Grew them from the size of urs to 28" and 30" in less than 6 months on pellets. Super active fish and very rewarding to watch grow so quickly. good luck! Cute at this size... they start gettin scary as they grow lol... Very smart/aware specimen.... once they know u have food theyll follow u around as would any other "wet pet". Sooner u get ur guy on pellets the better, shouldnt b as hard as u think considering it was probably farm raised.