I have 125L tank with 6 Zenra Danio's in it at present. If i wanted to get some Dwarf Gouramis can i get both red and blue dwarf ones or should i stick with just the one colour?
You can mix them, it's still the same species of fish despite the colour variants - and only the males are colourful. I'd probably be tempted to only keep one in a 125L after reading this: http/www.tropicalfishfinder.co.uk/article_detail.asp?id=25