I’ve had aquariums for over twenty years. Always fresh water. I have a small one now, 10 gallon, that I’ve had for around 5 years now.
I have a rather large placostamus, some neon tetras, a couple of black tetras and a cory catfish. They’ve all been alive since I’ve had the tank, absolutely no problems at all.
I went to Petsmart and bought a couple of tiger barbs and four red swordtails, a total of six fish. I do have a very good filter and air pump as well, so I know the water is clean and well aerated. I also test it for chloramines, chlorine and ammonias regularly.
Within a week and a half, all of the “new” fish have died. The originals are perfectly okay.
Has anybody else experienced this with fish from Petsmart? What in the world could have happened? If I had too many fish in the tank, I would have thought that my original fish would have suffered as well. but like I said they are still just fine.