I know this is an old thread but I just got some Northfin Carnivore samples from Super Cichlids.
The clown loaches went nuts for it. They like it even more than Hikari Sinking Carnivore (I'm going to stop feeding that when the rest of my bag is gone).
My huge Loach, Mama Loach, came out of her cave twice to grab the wafers. She almost never comes out with the lights are on.
I put a wafer in my qT tank with a lone clown Loach that I'm quarantining and he grabbed it immediately.
I still don't like how they were dishonest about the Ethoxyquin as explained in a thread in 2017.
I do have to say that the fish went crazy for my samples.