oxygen problem

The issue: one of my glofish seems to be gasping, lathargic and slightly emaciated. Note: all my fish get fed regularily and I try to make sure all the fish get a decent share (without overfeeding them ofc). but the issue is that its just the one glofish thats acting like this. All of my other...

Someone please help im worried about my new betta. The pet shop told me I can add him in one day after setting up the tank. He’s been in the tank around 36 hours now and was doing fine however i noticed the tank temperature was slightly out of range at 84°F so i have now lowered it to 80°F. I...

I have 6 fish in my tank, 3 guppies and 2 balloon mollies. However, since last night, I’ve noticed they’re all swimming around at the surface of the tank. Particularly the guppies. I’ve got no clue why because I have a pump that sprays bubbles so I’m sure there is enough oxygen in there for...

I have 6 fish in my tank, 3 guppies and 2 balloon mollies. However, since last night, I’ve noticed they’re all swimming around at the surface of the tank. Particularly the guppies. I’ve got no clue why because I have a pump that sprays bubbles so I’m sure there is enough oxygen in there for...

Hello! I have a 55 gallon freshwater tank...have been keeping fish for about 10 years - I understand oxygen levels being low cause fish to gasp at the top but I can't seem to find out what iscausing this after all was fine 2 weeks ago. I have made some changes to the tank - here they are.. 1 - 6...