i would think that she is showing sensitivity to the ammonia. if the lowest your ammonia has ever been is <0.25 (and i think you actually mean >0.25, right? remember the crocodile eats the bigger number in 'greater than/less than', lol).Water parameters are Amo:<0.25 (as low as I ever see it), Nitrite 0, Nitrate about 80ppm. I performed about a 30% water change.
you could bump up your water change amount. goldies are incredibly messy and dirty and by looking at your nitrate level, you might not be doing large enough water changes. i'd suggest 60% or so weekly.