That's about it, he's more curious then afraid. Even my gravel Vacuum he keeps trying to swim into to see where it goes, makes water changes entertaining. Even his filter, the first thing he did was flare at it, then he swam up the spill way and went to sleep inside. Now it's one of his favourite places to be.
I'm trying to cup train him though. He still runs from the cup but when I get him in it I give him a few Brine Shrimp and he calms right down distracted by the nommies. Hoping he learns that cup=treats.