I think a lot of people call goldfish really messy because they have this conception of being a "beginner fish" that stays small, cute, clean, and easy. You can just put them in a 1 gallon glass bowl with no filtration and add a few drops of water conditioner and be good.
Obviously that is far from true, but if you start with that conception than anything is messy from there.
And, they are fat and eat a lot.
Obviously that is far from true, but if you start with that conception than anything is messy from there.
And, they are fat and eat a lot.