Missing Odessa Barbs
I have recently (2-3 weeks ago) added odessa barbs to my 50gal tank. I originally got 4 - 2 males and 2 females - then went back and got another pair. Shortly after I added the last 2, one of the original females disappeared. No body, no sickness beforehand, nothing. Just gone. It was about a week after she'd been added at this point so I assumed she had not made the transition (though it seemed odd, as she was perfectly healthy and happy). Now, I have just noticed one of the original males missing too. Again, no sickness and no body. Healthy, then gone. It's almost like they've jumped out or something. Is there anything specific about barbs that would lead them to die with no warning? Are they known to jump? I want to get another pair to replace the missing ones, but am worried there's something going on.
50gal planted - yoyo loaches, BNs, odessa barbs, giant danios
33gal planted - praecox rainbows, gold ram, bolivian rams, sparkling gouramis, licorice gouramis, lots of shrimp
2 x 5gal planted - bettas