Nitrite was at 0. I'm in the middle of a water change. Drained 80% and then started filling while still draining on other side so this should be more than 100% of a change (it's filled up to 50% level while draining as water fills faster than it drains when I do this).
I had the carbon sleeve from my Aquaclear box when I bought it two years ago as I don't use carbon. I added it to Aquaclear just in case there's some chemical.leaking from the sponges. Figured it won't do any harm and might help and I have it sitting around anyway.
All the other fish seem fine. I'll watch pleco closely.
I haven't added any fish in over a year and I change water regularly so I'm not sure if anything is wrong. The swim bladder fish from three weeks ago might have gotten injured. The panda Garra as well.
I guess it's good panda Garra died today because I was supposed to be gone for the weekend. I'll cancel trip if I see anything wrong after this water change. Dead fish would have been in tank all weekend as I doubt my mother would have noticed it. It was behind the sponge tower.