Fish bothering problems?

[UchihaCity]

Ok, so I have about 10 Goldfish. I have a big one, and the rest are smaller than him. After a while, everything seemed fine, but then the smaller goldfish started bothering the big goldfish.

Almost all of them were after him, chasing him, and just bothering him.

So, I decided to put him in a bucket for a while, and when I put him back they start bothering him again.

I got 3 other small fish in there, that aren't goldfish, that don't bother him.

So, what can I do to stop this? I give them enough food, my fish tank is pretty big. Enough room for all of them.

Will I have to keep him in a bucket? Or just buy a fish bowl for him?

Thanks for the help.

 

[BBQ]

its possible that your tank is not big enough. i would suggest to keep your bothered goldfish (the poor thing, hes the biggest but not the most aggressive!) in another tank. I hope that there's peace in your tank. GOD BLESS.