Hello, my fancy goldfish seems to be ill and i’m not sure what the problem is. I have a 10 gallon tank with 1 common and 1 fancy goldfish (yes i know this is not ideal but my mom won’t let me get a bigger tank). There is also a filter and airstone in the tank. I’ve had the tank with these 2 goldfish for a year and my common has had 0 issues, but my fancy golfish has had problems with swim bladder disease, but i’ve been able to fix him by feeding him some peas. However, this time, my fancy goldfish will not eat any peas and i’m mot sure if it’s swim bladder disease affecting this time. I change 50% of the water every 2 weeks including vacumming the gravel and water each time i change the water. After conducting a water change there is 0-5 nitrate, 0 nitrite, water hardness of 250 ppm, water alkalinity of 70 ppm, and 7.4 pH. I normally feed my fish once daily enough for them to finish within a few minutes. The symptoms of my fancy goldfish started about 2 days ago when he started being very inactive and recently in the past day has just started floating around everywhere, but still breathing fine. All help is appreciated as I feel so terrible for my fancy goldfish, so please let me know anything. I can also send more pictures and/or videos if needed over some other social medias. Thank you.