I have a 4" Jardini that is currently growing out in a 40 gallon which contains 2 rocket gars at 5-6", a 1.5'+ ropefish,a 6" senegal, a 5" chinese hi fin, and a 4" pleco. The Jardini has been fine for 2 months, but this last week he is being aggressive to the rocket gars. As of now only one has any sign of injury and that is a miniscule cut on its anal fin, hardly noticeable. What puzzles me is that although the Jardini is more aggressive and the rocket gars show no signs of fighting back, he has multiple small cuts on his tail. Any ideas on who might be attacking the Jardini and how to fix it? Not sure I can do another tank for just the Jardini, but is this what is necessary?