9'' Royal pleco plump and happy, had a good appetite until it stopped eating two days ago, lightened up a lot and is breathing rapidly, obviously stressed.
It is not being picked on by tank mates, no resent changes. Temperature 81*, PH 7.6, Ammonia 0 ppm, Nitrite 0 ppm, and Nitrate rises from 20 ppm to 40 ppm in between water changes.
Picked this guy up six weeks ago, but had an eye on it for two months. Anybody have any idea of what could be happening?
P.S. Diet consisted of Hikari algae waffers, zucchini, sweet potatoe, and driftwood.