Bettas are hardy when kept well, but poor conditions — cold, dirty or unfiltered water — cause most of the illnesses owners encounter. The good news is that the common problems are recognisable and, caught early, usually treatable.
Conditions to know
- Fin rot: ragged, receding fins, almost always linked to poor water quality.
- Ich (white spot): tiny white spots like grains of salt, often triggered by stress or temperature swings.
- Swim bladder issues: trouble staying upright, often from overfeeding or constipation.
- Fungal infections: cottony growths, again usually a water-quality issue.
Prevention is the cure
The vast majority of betta health problems are prevented by the same basics: a heated, filtered, cycled tank; stable tropical temperatures; regular partial water changes; and careful, modest feeding. A varied, high-quality diet keeps the immune system strong.
If your betta gets sick
Test and correct the water first — clean, warm, stable water resolves many early problems on its own. Fasting can help swim-bladder trouble from overfeeding. For persistent or worsening illness, an aquatic-specific treatment may be needed; research the condition carefully or seek advice before medicating, as bettas are sensitive.
