Thought I'd write a bit of a final update on this post to sum up my results.
So, attempting the red LEDs again sadly didn't seem to work on my tank. I think I'd need to have something on the tank long term for that to take effect, but with what I've tried the nocturnal tank members are only active when it's pitch black.
As for using food, the knife is still quite small, probably about 4" if I had to guess. So large foods are currently out of option. One thing I tried was making a simple fish trap out of a cut plastic bottle, which I then loaded with a portion of bloodworms. The opening was small enough that the other tank members couldn't access it, but it should've been a large enough entrance for the knife. The results for that were inconclusive though, as it was pretty hard to tell if the amount of food in the trap went down. Unfortunately I didn't really get a chance to observe anything because I usually head to bed soon after the lights go off.
Thanks to everyone for the suggestions though! I may try other food options in the future to lure it out, but in the meantime I'll just check when I have late nights and hope for the best. Or it'll eventually get big enough that it won't be able to hide as well lol, but that's probably a long ways away.
So, attempting the red LEDs again sadly didn't seem to work on my tank. I think I'd need to have something on the tank long term for that to take effect, but with what I've tried the nocturnal tank members are only active when it's pitch black.
As for using food, the knife is still quite small, probably about 4" if I had to guess. So large foods are currently out of option. One thing I tried was making a simple fish trap out of a cut plastic bottle, which I then loaded with a portion of bloodworms. The opening was small enough that the other tank members couldn't access it, but it should've been a large enough entrance for the knife. The results for that were inconclusive though, as it was pretty hard to tell if the amount of food in the trap went down. Unfortunately I didn't really get a chance to observe anything because I usually head to bed soon after the lights go off.
Thanks to everyone for the suggestions though! I may try other food options in the future to lure it out, but in the meantime I'll just check when I have late nights and hope for the best. Or it'll eventually get big enough that it won't be able to hide as well lol, but that's probably a long ways away.
