I just got a good fish today and it died why is that

The most common cause of death of a newly acquired fish is usually shock or incorrect water quality. Fish tanks should be set up and left running without fish for at least 3-4 weeks to establish a proper nitrogen cycle. There are products that can shorten this time period. If this is not done, there may be high levels of ammonia, chloramine, nitrates and nitrites which can kill a fish. When introducing a fish, the bag should be floated in the tank for about 30 minutes to acclimate the fish to water temperature. This can prevent shock if the water is too hot or too cold. Test your water quality with a home test kit or submit a sample for testing. Most pet stores or aquarists will do this for free or for a nominal fee. Correct any imbalances as indicated. Slowly acclimate any new fish as written above. You can request a consultation to discuss your concerns in greater detail if necessary. Buying fish and starting a tank can be quite confusing initially.

There can be many reasons your fish passed away. Most pet stores will replace your fish for no charge if it dies within a certain amount of time. I would also recommend bringing in a sample of the water your fish was in so they can check the pH of the water and make sure it is appropriate for the type of fish you purchased.

It is no trouble at all. It is why we are here! The first thing to check would be water chemistry. This can be done using a home test kit or by submitting a water sample for testing. Most pet stores will do this for free or for a small fee. Aim for 0 ppm ammonia and nitrites with a nitrate level of 20 ppm or less. Perform a partial water change, no more than 30% total volume, daily to stabilize or improve water chemistry. Use only aged or conditioned water that is temperature matched to prevent stress or shock. The species of fish you have do best in the mid to high 70s F up to about 82 F. If you have a newly set up tank, it may not have cycled properly or adequately. This would have led to toxic levels of ammonia which likely killed your fish. A tank needs to run, without fish ideally, for 4-6 weeks to establish a Nitrogen Cycle. This time period allows beneficial populations of bacteria to colonize the substrate and filter media. These bacteria are responsible for breaking down ammonia and nitrites into nitrates which can dissipate naturally, be used by live plants or be filtered out. A tank can be cycled with fish, however, close monitoring of chemistry and frequent water changes are required to minimize the risk of fish loss.