Hoplo's are brilliant fish, very sociable. I have had 3 for about 2 years now, 1 male and 2 female, they have never bred though so no bubblenest although that info is true.
They are schoaling fish though, they do better in griups of 3 or more. They do grow pretty big, up to 8 inches.
Hope this helps and good luck with the 1 you have left, let us know how he/she gets on