Is My Betta Ill?

[JasperLover]

Ok so I just got my betta fish and he's just staying still on one corner of his tank at the top near the heater and opposite the filter. My tank is 17l with a filter and heater so what's wrong with him

 

[AmtotheBurr]

Few questions. How long did you have the tank cycling before you added him? What is the water quality reading (ammonia, nitrite, nitrate)? Is the filter very strong?

 

[rockythebetta]

There are some physical signs of illness you could start to look for if you are worried that your betta is sick:
                     Unusual red splotches (bacterial infection)
                     White and fuzzy growths (fungal infection)
                     Fins curling (infection/fin rot)
                     Fins darkening (fin rot)
                     Fins receding (fin rot)
Unfortunately these have all been learned through experience (purchased sick). I would be happy to share how I treated these if you see any of these signs.
 
There are other signs of illness as well that I am less familiar with. Hopefully someone else can help you with those.
 
If you don't see anything physically wrong and you've just added your betta to your tank, he/she may just be stressed because it's in a new environment or the filter may be too strong. If your don't see your betta exploring after a week, start looking into ways to lessen the strength of your filter.