Jakey02578
Fish Crazy
The other day in my LFS he said i should put the water that i get given with a fish. In a different shop he said i shouldn't. The 2nd guy has been keeping fish for35 years (apparently) . Who's right?
Considering that you do not dry and sterilize the fish it is not a major benefit to not add the water to your tank. The presence of a pathogen can get in either way. And the presence of a pathogen doesn't mean a disease will break out. The fish have to be stressed to get sick (very few pathogens can infect healthy, unstressed fish). The reason I wouldn't add the water is that when fish are in the back they will poop more than usual, and the ammonia they give off will build up. This is extra waste that doesn't need to go in to a tank.
Considering that you do not dry and sterilize the fish it is not a major benefit to not add the water to your tank. The presence of a pathogen can get in either way. And the presence of a pathogen doesn't mean a disease will break out. The fish have to be stressed to get sick (very few pathogens can infect healthy, unstressed fish). The reason I wouldn't add the water is that when fish are in the back they will poop more than usual, and the ammonia they give off will build up. This is extra waste that doesn't need to go in to a tank.
Considering that you do not dry and sterilize the fish it is not a major benefit to not add the water to your tank.