betta fish and health treatment plans

[ocean_blue]

Mine got like that when I switched foods. Maybe try something different? I switched to fluval bug bites and he's way more active now.

[slicefang]

Could be a bacterial infection. Look for clamped fins or redness. If you see anything, a round of erythromycin might help. Just be sure to remove carbon from the filter first.

[Lumin]

Thanks for all the advice, everyone. I'll try fasting him first, then look into salt or meds if needed. Appreciate the help!