40 litre tank

I have a 40 liter tank and the water temperature is usually between 24-28°C. The water hardness is 50 FR. I want to keep only one sex of fish to avoid breeding. Can you suggest a peaceful species that can live in these conditions?

After selling both my 215l and rio 400l and saying goodbye to my south american cichlid collection i am pleased to say i have a fish tank again. although only 10% of the size of my rio i can see some potential especially with the nice pieces of bogwood and minimalist finish. I'm going to go for...

Hi all,   I visited 'Pets at Home' today and am looking to buy a 40Litre panoramic aquarium for tropical fish.  I have never owned tropical fish before so would really appreciate some tips from experienced fish owners.   I would like to introduce lots of colour to the tank but I am aware I will...