I have 3 comets and 4 neon tetras in a tropical tank and a male betta (red body with blue tail) in a separate tank. Would it be safe to place my betta in with the other fish?
aquarium - Betta with other fish..
Keeping betta fish with other kinds of fish can be tricky unless you know what you’re getting yourself into. During any new introductions, always have an exile tank ready in case you have to quickly remove your betta to safety. You should also monitor the introduction closely for at least 72 hours to assess compatibility.
Can I put any other fish in with a male betta? - Pets Stack Exchange
There are many other fish species that are compatible with the Betta. As always, do your due diligence and investigate online information as well as your local pet store.
Bettas can be housed with other fish under certain circumstances
Myth: Male bettas only fight with other males; this aside, they are peaceful community fish.
Reality: Most male bettas will fight with anything that even remotely resembles another male in finnage or coloration. Some will attack any fish indiscriminately, regardless of its appearance. It is inherently risky to house bettas with other fish. Some bettas are too aggressive to be kept with any species, and many community species will damage the finnage of a betta. This species does best when kept solitarily due to its special environmental and social needs. However, community keeping is possible with careful monitoring and appropriate tankmates if the betta's personality permits. Communal housing should always be approached on a case by case, individual basis! 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!