How did my fish die?

My family is on vacation and I accidentally killed the fish. I fed it the first couple days but I think I gave it too much food. The food dissolved and made the water all gross. I tried to clean it by scooping the bad water out and replacing it with fresh water. I got home from work today and it was dead. I’m not... show more My family is on vacation and I accidentally killed the fish. I fed it the first couple days but I think I gave it too much food. The food dissolved and made the water all gross. I tried to clean it by scooping the bad water out and replacing it with fresh water. I got home from work today and it was dead. I’m not sure what I did wrong. It happened fast so I’m confused. Please help
4 answers 4