Yeah gulpers are not cannibalistic, I’m going to try and breed them In my 50 gallon tank soon! I’m going to add a storyline of it when I get the other one. I’ve learned a lot considering it’s rarely done. Here’s what I’ve learned:
feed black worms encourages breeding
have a gravel filter and always have clean substrate
slate rock is important, I believe for spawning
LOTS of coverage
PH below 7, slowly lower it if it’s not under 7
imitate rain to encourage breeding
last of all LUCK, luck is very important as you may not have a pair that wants to breed or maturity difference.