Help! Fish trouble!
My fish is extremely skinny and has trouble swimming. I have 3 other fish who are doing fine. My fish is still alive because if I touch it with my net thing it will get up and move for about 10 seconds then come back down. Right now it is laying down. I removed it from its original tank and placed it in a small container thing with water in case it has a disease that can spread. Please help, how do I fix her?