Help me stock my South American biotype tank

[Druu]

150g, 6'x18"x28"

Currently planning on a lutino longfin oscar and south american lungfish. Possibly getting "common" coloration oscar (black and white only, no orange) to contrast with the lutino.

Looking for suggestions of other South American fish to put with them. Maybe a catfish that will fit in the tank at adulthood. Not interested in lima shovelnose.

Schooling dithers possibly, but I'm not sure what I can do in terms of South Americans.

 

[Nolapete]

Both of those fish get big, so your options on catfish for south american are limited to plecos and a few other more rare non-pleco types.

http://fish.mongabay.com/biotope_countries.htm has lists of fish by countries and biotope type. You most likely will want to click South American Whitewater River.