Abnormal gills

So, I'm not sure if this is in the right spot, and if it's not, I'm sorry. So I bought two female guppy from a LFS and it wasn't until I got home and put the fish in quarantine that I noticed her tail. Weird. And I think it was the next day, maybe same day, I noticed that I could see into her gill. Like her gills were much bigger than normal, sticking out from her body. She's doing fine, just a little aggression is directed towards her from her friend on occasion. And her friend's grills are normal. I'm not sure if it's of any help, but I also bought some corys from the place and seem to have a bit of fin nipping/fin rot in a different tank. Anyways, any ideas on the cause of the enlarged gills?

 

Inflammation and Redining of the gills is sometimes ammonia burn.
Do you know your
Ammonia
Nitrite
Nitrate?

Is this tank cycled?

 

I was wondering that. She was like that when I got her a week ago and hasn't improve. It should be because I added a piece of sponge from a cycled tank to the filter. No, I just did a PWC today and added some plants on Wensday..

 

I was wondering that. She was like that when I got her a week ago and hasn't improve. It should be because I added a piece of sponge from a cycled tank to the filter. No, I just did a PWC today.

I would recommend getting a water test kit when you can afford. Thinking and knowing are two totally different things.
Without knowing water perameters we cant rule out ammonia and nitrite burn / poisoning.

 

I would recommend getting a water test kit when you can afford. Thinking and knowing are two totally different things.
Without knowing water perameters we cant rule out ammonia and nitrite burn / poisoning.

I have a test, but like I said, her gills were like that the day I got her.

 

I have a test, but like I said, her gills were like that the day I got her.

She could have come from poor water quality. Or maybe gill flukes. But always water first.
What is your
Ammonia
Nitrite
Nitrate?