[ILLBETHEJUDGE]

Today i came home to one of my spotted cory being sick, he barely moves and he is breathing really fast; What can i do? Please help!

 

[registereduser]

Might be high ammonia? Can you test your water?

 

[ILLBETHEJUDGE]

Ammonia test is 0.25

 

[Olympia]

Is your tank cycled? Ammonia isn't THAT high. Do a 50% change anyways. But before that, can you test nitrites? If you didn't cycle the tank and you're going through your nitrite spike you'll need to do tons of WCs, nitrite is more toxic to fish than ammonia. You should also test nitrates.
Don't treat him with AQ salt, it's bad for cories.. Someone else may have some advice on what you can use.

 

[ILLBETHEJUDGE]

This is my new 20 gallon long tank. I had a 10 gallon tank before fully cycled, so i used the water, gravel, filter from that tank and added an extra filter, all my tests are okay and i did a 50% water change yesterday. Could it have something to do with the fact that i added 2 platy yesterday?

 

[Olympia]

Did you QT the platy? Are any other fish starting to look sick?

 

[ILLBETHEJUDGE]

No, what a big mistake! i did not QT them. I went to the store, let the bag sit on my tank for an hour and then i put the platies in the tank.

 

[Olympia]

Are the platy looking okay? Weird that just a Cory is showing symptoms.

 

[ILLBETHEJUDGE]

Yes. Platy are okay. Could it be that one of my South American bumblebee catfish attacked him? Weird because those are supposed to be peaceful and my betta has never attacked the other fish.

 

[Olympia]

I think you'd see physical damage, the stress would have worn off by now.
Just keep the water really clean, hopefully he will pull through. If you have a different tank, even like a bowl, if you have a heater, put him in, in case it's contagious. Or even float him in a plastic container in the main tank :/