I lost one of the sargassums a few weeks ago; he never took to eating well. The other's been consuming live shrimp well, but I was afraid my supply was going to run out (we quit collecting for the winter). Yesterday, I set a thawed silverside in there, wiggling it a little then dropping it-and she took it right away!
I just needed to celebrate and tell people who'd be excited with me-my coworkers don't seem impressed.