three Really Useful Arowana Tank or Arowana Aquarium Tips - Arowana Care Arowana tank or arowana aquarium is an essential component in the lifestyle of your arowana fish. So, you want to make positive that your tank or aquarium is proper for your fish.Underneath are three ideas on arowana treatment by having the appropriate aquarium for your fish.one. Tank measurementMake sure that your tank is appropriate for diverse measurement of arowana. A two hundred gallon or 750 liter aquarium is a advised minimum measurement, but it can go more compact