Try live blackworms. Throw them in preferably or near the pot. They should stay alive for a long while so he can pick them off 1 by 1. Small, thin dats find them easy to gobble down. Or just remove the jar and see if he behaves different
Hey man - Picked up 2 American Tigers last week and they wouldn't eat til today. Finally broke down and fed live minnows. Suddenly they were both all over the tank sucking them up. Give it a shot. I never fed that NTT live food but maybe that's the stimulation he needs. Wallago still hasn't eaten either by the way.
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I will try but the Arowana will surely gulp them up quickly but I guess it's worth a shot...I might try and divide the tank but I don't want to cause stress. And I fed the wallago big cuts of tilapia before I gave him to you so he is probably still good just try to drop the food on his nose just keep trying
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