eBetta.com

Bettas, like any fish, are aware that they are prey animals. In order to feel comfortable, they need to have lots of hiding places. As Bettas are from marshes and rice paddies, they feel more comfortable with ‘soft cover,’ generally provided in the aquarium environment from live or artificial plants. Like most tropical fish, they are more comfortable and will come out more and be more active if you can provide them with 50-75% cover – this means, make half to three fourths of your tank space hiding places. Providing sufficient cover will reduce stress and therefore improve your Betta’s immune system, reducing chance of disease

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Appearance:
A early sign may be red spots usually at the ends of the fins. The fins will start to dissolving and fall appart.

Symptoms:
The betta may act sluggish and have pale color. Usually because of poor water

Treatment:
You can use “Ampicillex” or “Neosulfex” by Aquatronics. Check your local fish store for medications.