My betta died within 24 hours?

[kymob]

I have numerous bettas and one of my divided tank has 3 bettas and one of them died with in 24 hours. Everything on him looked fine. no fin issues no discoloring. His tummy was a little big so I treated him for bloat. I did a quick salt bath 10 minutes in 1 gallon of water with 3/4 table spoon salt. After salt bath I put him back in his tank but put him in a baby guppie floating thing so he could get to the top easier. But the next morning he look really bad and by the lunch time he was suffering so bad I gave him clove oil to get him out of his misery. I tested water and all was good. But I am concerned about the other 2 bettas that shared the tank with him.
Would love to hear peoples thoughts as to what would of killed him so quickly and if I need to get the other 2 bettas out of that tank asap. Thanks

 

[FishFor2018]

Did you use salt or epsom salt? Any photos of how he looked when he was alive? Could you describe his symptoms more when you checked on him in the morning. Like lethargic, loss of color, no appetite ect. What were and are the water parameters?

 

[Noroomforshoe]

what do you mean he died in 24 hours? did you just buy him?

Or did he die 24 hours after the salt bath? what kind of salt was it? Were their other symptoms then slightly bloated?

If you used table salt with iodine i know that that isn't good. and if you added water from the iodine salt bath to the other tank, I suggest you do some 30-50% water changes.

 

[kymob]

what do you mean he died in 24 hours? did you just buy him?

Or did he die 24 hours after the salt bath? what kind of salt was it? Were their other symptoms then slightly bloated?

If you used table salt with iodine i know that that isn't good. and if you added water from the iodine salt bath to the other tank, I suggest you do some 30-50% water changes.

I have had him for about a year bought from breeder. I have 18 bettas and have never had anything like this happen. I examine everyday each betta so I really know how they are. Point being I knew this betta was fine in the morning but late afternoon stopped eating and had bloat symtoms. All tanks are well established and water perimeters are perfect. Salt I used was aquarium salt and did not even give him the dosage that was asked to use. I only did 3/4 table spoon. I do not think it had to do with the salt. No other symptoms other than his tummy looked a little bigger. It all happened so fast I did not take any pictures bc in the morning he was really bad. When he died all fins were fine just tummy looked extended and kind of gold ish

 

[Rose of Sharon]

For something that fast, I would think either an injury, or maybe he swallowed something. Is there anything on his side of the tank that he could have gotten into that would cause an internal injury? Or maybe a very small piece of gravel, or something like that?