Do you have any suggestions on what I should feed my betta so it will help strengthen his immune system? There's no problem with him right now, I just want to get something that will possibly help him.

I read somewhere that they make separate vitamin tablets or something for fish outside of the ones in their food. This is supposed to be good for building up their immune system, especially if it is currently lacking. Is that true? Should I find some of these vitamins, or just stick with good...

Are there any vitamins I can add to the water? Special foods? I know the temp should be at around 80 degrees. Thanks