I have 10 Bloodfin Tetras and 3 Black Skirt Tertras in my 20 gallon with Dante (Betta). The Bloodfins are no problem, as they are in a school and pretty much mind their own business. The Black Skirts are a problem only because they don't like each other. Dante was fine with them, until recently. Now if they start chasing each other, he starts chasing them!
I've never heard of Neon tetras nipping the fins of any fish....... always thought they were very peaceful, but also kind of delicate.
PS: I'm trying to find a home for the Black Skirts..... don't think my LFS will take them, as their fins are now a little ragged looking, due to their constant bickering between themselves.
I do not recommend Neons with Bettas. They will not be able to resist the Betta's flowing fins. Cardinals could work but it depends on the tank size. They are active fish and need a tank of at least 20 gallons.
Never put a male betta with a female betta unless they are spawning and then ONLY for the length of time it takes them to spawn. The female will end up dead and the male injured. They are no more compatible with each other than two males.
Male Bettas and Females as well generally get along fine with Otocinclus catfish (Otos) and Corydorascatfish (Cories) and I have heard lately that some Rainbows go well with them. (I personally am going to try my luck with a couple of Dwarf Loaches within the next few weeks)
that's really good to know! though I am not likely going to get another betta because I just recently lost on and now I have 2 neons - I have them in a 1.5 gallon tank - is this big enough? or do u recommend a bigger tank? thnx Miley :-\ ???
Let us make sure we are clear, the small tanks we are talking about that people keep bettas in are really recommended to start at 5 gallons. 3 gallons is okay temporarily but not for a long-term home. NO small containers or Betta Boxes or Bowls.
If you put a betta in with other fish of course the tank needs to be bigger. If you put a betta in with Cories then you need 10 gallons minimum. With Otos 5 gallons.
No itty-bitty tanks, sorry.
Miley, the 1.5 gallon tank is not big enough to house the tetras. The general rule is 1" of fish for each gallon of water, Tetras can get to 2" each so you already need a 5 gallon tank just for the two you have.
AND the one item I was trying to get across to you and to others is not to mix a male and female betta in a tank ever!