I have a new 20 gallon tank with 2 black Mollies, 5 Neon Tetras (used to be 6 :\), and 2 Pink Kissing Gouramis (used to be 3 :\). I'm confident that I won't lose anymore fish thanks to a poor cycling start, but I'm now concerned that one of my Gouramis is getting too stressed by the other. They're two males and they absolutely love to kiss-fight, but I can tell one definitely dominates as the other will try to back away. Sometimes I catch them speeding around the tank chasing each other and kissing at the body, which I read was harmful to the stress coat. Should I add two tablespoons of aquarium salt-- most importantly will this cause danger for the other fish, especially the Tetras? I'm fearful for them the most because I'm supposedly not meeting their pH needs for the sake of the other fish. That's probably why I lost one. And the GouramI I lost could've easily been from stress, I think I have a bully. Any help appreciated, thanks.