Can you substitute rubbing alcohol instead of vodka to kill a betta fish?

The full change is what is killing him. OR more exact, the ammonia caused by the full change is killing him. Do immediate partial water changes to improve the quality.

Please research about the cycle and how to properly do water changes. Also get a test kit and test your water to make sure you are providing a livable environment for your fish. Water quality is of the utmost importance, and not something you can just "see" without testing.

Water can look clean and be deadly.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.