Velvet is another pesky little parasite. If you always add aquarium salt to your betta’s water (1 teaspoon of aquarium salt per 2 1/2 Gal of water) and one drop of Aquarisol per gal, your betta will probably never get velvet. It is very contagious, but bettas will fully recover if treated promptly. Velvet is the number one killer of small bettas
Fine grey-gold to whitish ‘dust’ on the body.
Very rapid gill movement.
Scratching or flashing.
Look for clamped fins.
Loss of appetite.
Loss of color.
As Velvet is highly contagious it is important to eradicate this problem as soon as possible. Treatment is aimed at the free swimming stage and there are good cures available from your local freshwater aquarium fish store. Velvet is a parasite. Because velvet is very VERY contagious, it is preferable to treat the whole tank when one fish is found to have it. BettaZing contains two agents that are proven velvet killers, so it is extreamly effective against this disease; best velvet killer. Use Bettazing at a 12 drop per gallon concentration. Isolate any betta with velvet, treat the whole tank even if other fish look fine.