Bettas do not do well at all in a community tank with other fish
i have 3 glofish in a 10-15 gallon tank, would it be okay to add my male betta in with the glofish? would the blacklight bother the betta?
If a possible tankmate qualifies for all 4 conditions, then they should make great tankmates with a betta. Another important condition is the betta's personality. Becuase every betta has his or her own unique characteristics, whether or not a tankmates will peacfully live with the betta varies widely. An overly aggressive betta should only housed by itself while a shy/ peacful betta can possibly live with guppies or other colorful fish. However, bettas are solitary fish meaning they do best by themselves. That's how they live in the wild. Additionally, adding fish to a betta tank may cause the betta to become aggressive because it thinks that another fish is swimming over his/her territory. But that doesn't mean you shouldn't get your betta a tankmate. As long as your betta doesn't show any signs of distress or become aggressive, everything will be alright. It's up to the owner to decide whether or not to get a tankmate. Now, on to the common tankmates!
There are ways to see this behaviour without introducing another male betta fish. One way is to use a small hand mirror and place it up against the tank glass so that the male may see his reflection. The Betta will mistake his reflection as another male and the fighting posture should then be displayed. Doing this too often may lead to an overly stressed fish though.
two betta fish in one tank without them trying to kill each other.
What Fish Can Live With Bettas? | Online Betta fish guides
Although many believe that bettas can only be housed by themselves because they'll "kill" anything alive in the tank, bettas CAN be housed with other fish/invertebrae. In fact, there are quite a few species that can successfully coexist with a betta. The general rule is that a betta can live with anything as long as it's Finding Betta tank mates can be a pretty hard task indeed. One thing that you definitely need to know about Betta fish is that you cannot keep them in a tank with other Betta fish because they will fight each other. In fact, male Betta fish are extremely territorial and will often fight to the death. Peaceful if given the right tank mates. They will become aggressive with other Bettas. They may also become aggressive towards other tropical fish with large fins such as guppies, and others.One of the biggest reasons as to why the Pygmy Corydora makes a very good tank mate for a Betta fish is because they have a pretty dull coloration. This means that Betta fish will not feel territorial around them, nor will they feel threatened by them either. These are very peaceful fish found in South American waters and they do will with other species of fish that tend to be violent and aggressive such as Betta fish.