I recently bought 6 Corydoras for my tank (85 gallon). I acclimated them properly and slowly. Even checked the pH, ammonia, nitrite, and nitrate levels to make sure they're ok. I released them in the tank after acclimatization, all of them were fine. Then I went out for a couple of hours. When I got back I saw five of them were fine and so were other fishes in tank (platys, swordtails, and zebra danios).
One of them got stuck in the plants and was upside down. My first thought that it was dead, but then I looked closer. The gill is still moving so it is still breathing. I helped him getting unstuck from the plants but then it swam funny and upside down. Like it had so much trouble with buoyancy. It continues to swim upside down (struggling mind you), if it stops swimming it'll just sink right to the bottom.
I don't know what's going on. The other fishes are just fine. Can anybody help me out?
Thanks.
PS. Can someone help me ID what type of Corydoras these are? I'm thinking Julii or Delphax, but I'm not too sure.
One of them got stuck in the plants and was upside down. My first thought that it was dead, but then I looked closer. The gill is still moving so it is still breathing. I helped him getting unstuck from the plants but then it swam funny and upside down. Like it had so much trouble with buoyancy. It continues to swim upside down (struggling mind you), if it stops swimming it'll just sink right to the bottom.
I don't know what's going on. The other fishes are just fine. Can anybody help me out?
Thanks.
PS. Can someone help me ID what type of Corydoras these are? I'm thinking Julii or Delphax, but I'm not too sure.