Ok, I have an Oscar who's probably 6-10 years old, if not older. All of the sudden, he's getting hith rappidly and badly. His water is 0ppm on Amonnia, Nitrate and Nitrite. Filters are in great shape. Everything seems fine. Water changes every two weeks (even then the levels are very very low, I do it out of principle).
Any suggestions or ideas? Just old age?
Any suggestions or ideas? Just old age?