Juvenile axolotl not eating

I have a juvenile/young adult currently tubbed that we got 3 days ago. He was apparently eating fine at the pet store (he was tubbed there too) but he hasn’t eaten anything at all for us yet. We’ve tried red wigglers (including blanched), pellets, frozen krill, and blood worms. I think they may have been spoiling him because they were giving him live feeder fish at the pet store, but that isn’t going to work for us long term so I don’t want to continue that. It’s been almost 3 days since he has eaten anything. He apparently ate “a lot” at the pet store before we got him. He doesn’t show any signs of distress and has been pooping fine. He isn’t very active in general though, except for when I do the 100% daily water change. Is there anything else we can try or do differently? TIA!