My understanding from my aquarium days was that most of the standard tropical fish were acceptable with a Beta. I think I've heard that they might want to nibble at the fins of an Angelfish. The big no-no of course is a second male Beta.
Good fish for a 10 gallon with a betta are Cory catfish (be sure to get the pygmy variety or else you are in for a surprise) cherry barbs, and depending on your bettas personality neon tetras. some betts can get along with neon tetras, others don't. All of the above mentioned fish need to be in groups of 6 or more because they are highly social fish, and will become the fish version of insane if they don't have alot of their own species around them. what do you mean by "betta couple?" male bettas should NEVER be kept together in the same tank unless it is divided, and females should NEVER live in groups of less than 4 (in a ten gallon you could do 6 females if it is heavily plated and decorated, but you shouldn't add other fish).
How about a beta? They are solitary fish, but they do well in small tanks. A five gallon tank would be more than enough for one. Anything less than 1 gallon is not enough.
I have kept fancy gold fish that are around 2x-3x bigger then the beta fish in a 10 gallon tank. There are stories of fish being ripped apart. If you watch the tank after adding a beta you should be able to find out quickly. The less crowed the tank the better. Betas are very territorial of space.
If the Beta Fish doesn't eat then it means that the Beta Fish is sick. I know this answer because I had a Beta Fish in my class in grade 4.
At least one gallon, any smaller, then: you would have to clean it allot more. The fish would be miserable of boredom, living in unsanitary conditions. And stores such as wall-mart, will be profiting from all the fish you replace. Just trust this coming from a guy with a 10 gallon tank complete with very happy beta, its worth seeing a pleased fish. Lastly, go to pets stores instead of walmart, follow the right instructions for your specific fish, and you and your fish should be good to go.
The rule of thumb is to keep no more than 1" of fish per gallon.
No, you cannot put these two fish together. In general you should keep Beta's alone by themselves, not even with other Beta's. They are mostly kept in bowls without a light, a heater or an oxygen line. The Beta will kill your guppy.
a gold fish or a beta fish
You could, but it is very dangerous because the beta would eat the gold fish. 🐠🐟
a beta fish is one.
the Chinese beta fighting fish
You could put a beta in a 100 gallon aquarium and it would do just fine, so long as it had floating plants to give it safe harbor and quiet places to build it's bubble nests. Beta's don't like a lot of current in the water and they love to hang out near the surface of the tank.
beta fish