It's gotten way worse his body has become curved, and he can't really swim when he does it's flailing and whirling. I am doing an emergency water change....any help or advice would be much appreciated.
My pH is at 6.8 Ammonia less than .25 and Nitrate at 5
He is breathing heavy and having difficulty staying up right. Last water change was two days ago 25% adding only 5% back at time. it's a 40 gallon aquarium with another cory, a loach, a pleco, and an angelfish. He was the newest fish but is...