Ok, Yall said before that when the black markings showed up on Pato that meant he was HEALING from ammonia burn right?

Well like in my other thread I said more markings had showed up like it's getting worse. I checked today and didn't notice anymore markings but it has me worried. I've been checking the ammonia and doing water changes. I just wanna know if the markings will disappear and if they keep apearing if it means he's getting worse. Also, he's very active. Eating good. He's very alert and everything so he shows no signs of being sick other than he markings but I just don't want them to get worse. I tried to call Petsmart (where I got him) and the woman didn't even know what a Ryukin was.

So I'm not taking advice from them. That's why I really wanna know what yall think. I also have another question, when I had my Oranda with him, why didn't the Oranda get the markings as well? Why only Pato? PLEASE.. PLEASE reply