I lost 5 betas... they were all new from PetSmart.. all females I lost 4 in one day.
I have now started all over... I bought all new gravel. cleaned the tanks.. and I'm testing my water almost every day and doing a water change daily as needed until the cycle is done.
I also think the betas I bought at PetSmart were sick, and that also killed two of the betas I had also.One got pop eye.. ( my favorite Betta) I was heartbroken I lost him.
I am now starting over and watching my tanks and my Bettas like I'm OCD !
And If and when I get any new fish in the future I will keep them in a separate tank until im sure there healthy and not carrying anything.
The ammonia issue is gone now and my tank water in all my tanks are good but I'm also a slave to it for now until the cycling process ends.
Its all very hard because all my Betta's have large tanks.
Two are in a divided 29 gal tank.. one is in his own 29 gal tank.. and two are in a divided 55 gal tank...
and one 20 gal tank ( empty for now) and a 10 gal hospital tank. ( empty)
So as you see I have had a lot of work getting these tanks all cycled and safe.