I'm new to this forum. hello! my Oscar has done nothing but swim up and down the side of the tank for about 3 days. is something wrong with him?

nope, this is normal oscar behavior. you'll find that they do some crazy stuff. my one o does the same thing just swim up and down by the side of the tank like a maniac. he rarely leaves that side glass even while eating. im guessing hes a juvenile, when they grow older they less frantic then he'll probably cut that out

Oscars are often called river dogs. They behave a bit like a dog. When young they are like a puppy, always moving around and never seem to stop and go mad when you come into the room. When they get older they calm down a lot but sometimes go mad (like at feeding time). When they get real old they move slowly almost like they cant be bothered like an old dog (or a grumpy old man)