You're not allowed to edit your messages after a certain amount of time has passed. Not quite sure why this was implemented, but that's why you can't edit your original post.
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I agree, keep trying. If you can do some research and really try to get the wild like tank look and feel maybe one day they'll do the deed. I did some reading on their breeding habits, and it seems like it would be tricky, but not impossible to get it to happen in captivity.