You can ask a wide range of questions about aquariums, thousands of fish species, taxonomy, fishkeeping, fish breeding, aquaponics, hydroponics, limnology, marine biology, water chemistry, etc. Well constructed questions usually generate better answers. Asking the question in any major language will generate a response in that language. For minor languages, use the translate feature above. If you don't get the information you are seeking try rephrasing the question.