A surprising growth spurt indeed. I hope it's a Sorubim lima then, not elongatus. If you like it so much, consider getting 4-5 more. The pleasure / fun level will increase super-linearly. Meaning ~10-20 times. You will see their interaction, which is fun. They will get more relaxed and more naturally behaving. They will swim more. Far less of a chance of spooking. When they all float vertically in ~sync, it's an unusual and adorable sight.
Beware though they will associate less as adults.
That's what I did last time, she nudged it with her snout but didn't take it. Right now she's eating about every other day, so tonight I'm going to try just massivore again and see how it goes! I'm hoping that stuffing her food with it has gotten her used to the taste.Try not feeding for a couple days and drop the massivore in at dark. I bet he'll take it. Try to hit his wiskers with the pellets when you drop them in.
That's what I did last time, she nudged it with her snout but didn't take it. Right now she's eating about every other day, so tonight I'm going to try just massivore again and see how it goes! I'm hoping that stuffing her food with it has gotten her used to the taste.