Female Bettas should be OK together provided you keep to the rules of fishkeeping. Bettas are tropical and need to be kept at around 78F to 80F. The rules are. :- 1 inch of fish needs at least 1 gallon of water but more is better. :- Every tank needs a permanently running cycled filter. :- Every tank needs at least 50% of its water replaced every week. Stick to those rules and you stand a chance of keeping fish successfully. Miss out on any of them, and I can guarantee that your fish will have constant health problems.
Yes but have a few good hiding spots and watch to see if one bites the other one.
yes
No, you should put them all in a separate tank.
Not for long. The neons would be eaten pretty quickly.
If you try to keep a male and female (or females) in the same tank permanently, the outcome is always going to be seriously injured or dead females. You cannot keep males with females. Under very carefully controlled circumstances during breeding the male will not kill the female (he will usually nip at her, but not seriously harm her.) But male and female in same tank = dead female.
No the beta will try to kill it
Yes as long as your tank is big enough for them and you have a filter and heater in it. Neons are schooling fish so you need at least three of them for them to be healthy. I believe that neons get to be two inches and the rule of thumb is one gallon for every inch of fish for tropical fish. Which means you would need at least a six gallon tank in order to have neons but a ten gallon tank is ideal.
Neons
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.
no you can not put a female and male fighting fish in the same tank because they will just kill each other
put a male and a female in the same tank
Yes you can but they will try and attack each other and may hurt themselves bumping against the glass. Also you can put a male beta (with the big tail) in the same tank as a female beta (no big tail) without using a divider. Also you can put two females together but they dont look as nice as the males.
If they have just laid eggs, he is chasing her from the nest. Get her out of the tank, or he will kill her! Males are in charge of raising babies, and will not tolerate other fish around, not even the female.
Of course!