i took the goldfish out and put them back in their own aquarium and then i bought some "floating" frozen bloodworms cubes for the bluegill :/ i guess they float ... for about 45 seconds before they sink to the bottom of the tank. some of the fish would come up and nibble at the bloodworms that fell off the floating cube, but as soon as the cube sank to the bottom of the tank they seemed to have little interest in it, perhaps they got back to it later but i dont think so. we just had a cold front come through, tank water temp dropped to 50 and i haven't been able to spot the fish in the tank at all, except 1 little super fast streak and then i lost sight of it. i even went as far as to test the water (ammonia, nitrite, nitrate ... almost all at at 0 and 6+ mg/l oxygen) thinking maybe the fish all died, floated the the surface and got eaten by the cats. even throwing small beetles into the tank isn't getting a reaction and they where attacking those really hard. i guess 50 is about the temp they get close to not eating...?