Betta Splenden Velvet Disease Treatment
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 hard to spot, but can be best spotted with a flashlight. Shine the light on the betta’s body: if it looks like it is covered with a fine gold or rust mist, then it has velvet. A betta with velvet will act sick, so look for clamped fins, scratching against rocks/gravel/tank, loss of appetite, loss of color etc
Velvet is a parasite. Because velvet is very contagious, it is preferable to treat the whole tank when one fish is found to have it.