Tetras tend to nip the bettas fins I am sorry to say. Since the bettas do not see them as threats they tend to just allow them to do it and then the bettas end up with infected fins. I have not heard that the Cardinal tetras do this but the others all seem to do it. I do not know that I would try it but I cannot tell you not to do it. It is definitely up to you and I do know it would make a really nice looking tank but it would be my recommendation that you definitely have a back up tank in case the problem comes up so you can move the betta or the others if you have that problem. The betta will not probably bother the tetras though as they do not usually see them as challenges.

Rose

As far as other native fish around them, you must remember that the bettas you buy in the stores and through the breeders have never been in with any other fish not even any other males or females of their own kind. they live in a jar or container by themselves totally solitary confinement. This is why they do not know how to play nice with other fish sometimes and it is a crap shoot whether or not you will get a fish that will accept other fish with it or not. they do not know that others are allowed to share their water. As soon as the fish is determined to be male it is put in its own container and remains alone until it comes to its owner (you) and the first time it sees any other fish with it will be if you put them in the tank with it since it was a tiny fry. This is a total shock to these fish.

So I would guess that no, there are no other fish that are native to its environment.

Rose

Yes Rose Thanks for that. I would have a back up tank incase that happened but it would be the tetra getting moved not him.I would really need to keep an eye on him the first 48 hours just to see if they having a go at him and also everyday now again if they aint and look for fin bites. Il get me pics up rose soon . I lost the lead to plug in me camera up to the comp lol.Maybe its under a fish tank . Thanks .Mark

Good and we have missed you. Hope you don't stay away so long this time.

Rose

This is my new Betta tank set up with yoshi in it. the 60L biorbs bubbles made the surface to unstable for my liking so yoshi well happy in this tank. Have posted me pics in gallery. thank you for looking. Mark

great pics and happy betta!!! He looks so Happy!!! Congratualtions to you both...I can tell you really love the little guy and he is so glad you do!!!

Rose