Betta fish are perfect for small tanks of at least 18 liters, maintain water temperature around 25-27°C, pH between 6.5 to 7.5 & change water once after every 7 days. 

You can keep group of colourful glo widow tetra fish in your 70 liters capacity aquarium. You can feed high-quality flakes or pellets twice in a day. 

There are various type of Cichlids that you can keep in a aquarium of at least 200 liters capacity aquarium. Maintain water temperature around 24-28°C.

Also known as Nishikigoi, are colourful aquarium fish that are native to Japan and are known for bringing luck to our life. Water temperature should be 15°C-25°C.

Another luck bringing aquarium fish that are prized for their majestic appearance and graceful swimming is arowana or dragon fish. Keep them in 1500 liters capacity tank. 

Popular for triangular body and flowing fins, angel fish can be kept in a 75 liters capacity water tank & can thrive well in 24-28°C with neutral pH. 

They are recognized for distinctive beak-like mouth that looks like a porrot's beak and bright scales. You can keep them with peaceful cichlids, oscars, etc.