#harliquinrasbora

I've kept fish for 23 years and grew up with my parents having fish but I've never seen this before. One of my harlequin rasbora suddenly, over night with no warning, started swimming erratically and in circles, upsidedown. It's lost a lot of colour and seems to have a cut on its dorsal fin and...

I've had my tank for about 6 months now. I have a male Betta, 7 harlequin rasboras, 4 Cory catfish, and a common pleco. My Betta has never been an aggressive fish. He's super sweet and even comes to the top of the water to let me pet him. But recently, he's lost about a quarter of his tail fin...