Red eye tetras are very nice too, they are really really shiny with bright red eyes . Also gold tetras can look AMAZING in big shoals. They are much nicer in real life than they are in pictures, they always turn out silver in pics but trust me they look really good in real life. Also you should add LOADS of amano shrimp to that tank. They will keep ontop of the algae, clean up all uneaten food and barely add to the bioload .