Don't worry about it. He will die when his time is up. Why rush and try to anticipate bad things.
3-4 months. And they usually stop spawning at a little over a year.
A male Betta will only tolerate a female in with him during the courting and spawning process. Once this (spawning) is over he will kill her if she is left in with him.
No, after spawning the male cares for the eggs and fry for the first few days after hatch. The male chases the female away after spawning is finished and she has no further input on the raising process. A male will often kill a female who's not removed from the spawning tank soon after the process is over as he becomes very protective and considers all other fish including the mother as an invader.
There are over 20 members of the Betta family that I know of. They are all small fish and all have the same labyrinthine breathing system. None of them have the magnificent finnage of the common Betta splendens though. Other relations of the Betta are all of the other Anabantids including the Gouramies.
They are instinctively fighting over territory and breeding rights, only one male will dominate.
they are finichy only betta fish food is safe anything else will over fill poison or not provide enouph nutrients to keep the fisha alive
This is called oviparity or spawning.
They want territories and they fight over it. They are greedy fish. They will fight to get territory
mabe because you are over feeding it
check the PH in the water,
over feeding it ,taking it out of tank or vase and not claening its tank
It is best that all fish have a filter besides Betta fish. Betta fish don't need filters cause the filter pushes them over with their big fins. Goldfish should have a filter on there tank because they are often overfed. If you have a filter you won't have to change the water as often. The only fish that shouldn't have a filer in captivity are Betta fish.