dojo loach injury

Hello all this is my first time using this website and I am in desperate need of anything anyone can tell me. I have a 65 gallon, heavily planted (aquatic plants and pothos/swiss cheese plant on top), levels are 7.0~ PH, 0 ammonia, 0 nitrite, around 10-20 nitrate. They are used to much higher...

Hey y'all! This morning during feeding I noticed that one of my juvenile Gold Dojo Loaches, Catnip, has a small bump on the top of her head, back near where the gills meet the body. It's not a cut or open wound, just a small bump. She's acting completely normal, eating and swimming around to her...