HI new to forum because I need some help. Sorry if this is long. I have 2 fancy goldfish in a 10 gal (oranda and lionhead) Got at same time and were same size but the oranda is now triple the size of the other. He has been a bully and especially around meal time. To the point where I had to overfeed so lionhead could eat. Tank was always cloudy. Noticed a lot of white poops from lionhead and that he was often hiding. Decided enough was enough, set up another tank for him. But after removing him, the other fish seemed to get depressed and quickly say fins get ragged. (Similar to after I first got them. Which then I cured with fin and tail rot treatment) He also stopped eating. Started just hanging at bottom of tank. After about a week of the other fish getting well fed, I put him back in. Hasn't really helped the oranda. I thought it was stress or depression. But could it be something else? I tested the water, it is fine. Thoughts?