Guppies harassing each other

I bought 4 guppies plus a sword a little less than a month ago and added them to my 10 gallon. We just came back from a week long vacation and one of the white guppies looked severally underfed. The 2 of the fish had big bellies and the other one looked normal. The next morning that white guppy was dead, and now one of the other ones is not looking good. The other guppies keep harassing him. What should I do? They were fine before this. Please HELP!!

 

You could Remove the unhealthy fish and put him in a different set up . Then you can rehabilitate him. If he’s revive able. I’ve had this same problem and I’ve also removed the bully Instead.

 

Ok thank you and what would you suggest if putting the fish in another set up is not possible? He is also not eating. Thanks for the help.

 

Well I’m sorry but he will probably die if he is still being harassed .

 

You can try adding a bunch of plants to break the line of sight.

Have you tested your water?