Thank you! I currently don't have any KH test liquid it was out of stock last time I tried to get it lol.
But I'm pretty sure she's still eating she came out each time to eat but I didn't supervise to see if she was spitting it out, her gills are red. And I'm now noticing a few others are red/brown which happened last time I had columnaris too.
I've done a water change and added salt yesterday, I also added some pimafix and melafix as some had some fin rot and it's just what I had on hand that wouldn't screw the cycle.
Redness on some fish decreased and she started swimming more hence why I got the video before that she was hiding behind the filter and wouldn't come out.