Is there a particular reason for adding salt? Do you normally do weekly water change. If so how much do you change each week? If you have been doing your weekly water changes then I highly recommend you change out no less than 50% of the water now and don't replace the salt.My nitrate is at 10-20 ish. I did a water change this morning, but a tiny one. I did about 20-25%. Added salt, checked again. He’s still hanging at the top of the surface
Plenty of flow, I have the sponge filter, & hob filter going. As well as minimal bubbles out of the bubble bar. So it’s pretty good in there. But could it be too much?How is the water flow on the surface? The surface of the water should be rippling to allow gas transfer. My fish did that same thing when I had a bad bacteria bloom that was using a lot of the tanks oxygen.