I've had him for 17 days. I cried. Is that stupid? I did a water change with Prime and I don't know what happened. The other fish seem to be happy. I almost wish I never bought him. Now I have 1 and he will be lonely without his buddy. Then I found this article www.otocinclus.com - Home of the Dwarf Suckermouth Catfishes Has anyone or does anyone know about this???