how do i keep my cat from fighting?

Separate them and don\\\’t allow them unsupervised visits. If they start to fight, clap loudly or yell \\\”NO!\\\” to stop them. I wouldn\\\’t recommend the water, as they\\\’ll likely see that you are the one doing it and start to fear you. That isn\\\’t the kind of relationship you want with your cats.

Is one a new addition to the household?

well thats easy all you have to do is get a water bottle and start spraying if that doesn\\\’t work then get them as FAR as possible kk hope that helped.
Turtle

You could seperate them & just don\\\’t make them have eye contact much.
if there constantly fighting than maybe one of your cats is annoyed by the other,a little to much.
might wanna give one away?