Urgent Help,Fish dying!

[fishboy23]

all my fish are dying I just did water change and heated up the aquarium help

 

[Jeffsglo]

Ok, what's going on? Do you have a way to test your water? If so what are the ammonia, nitrites, and nitrates? Do you use anything to dechlorinate your water? What is it? Tell me what you have been doing and what has changed

 

[fishboy23]

All the things are the same in terms of water change just the heater and some tropical fish were new four fish died overnight please help

 

[bumblinBee]

What are your parameters? What kind of fish did you add, what kind did you have before adding the new ones?

 

[IvyVines]

Check your water temp and make sure it is within your fish's parameters. Also, did you quarantine the new fish? they could have something from the store. Finally, did you rinse the heater? It could have had some chemical on it from packaging or production.