So turns out the ammonia spike was very temporary. It was gone within 24 hours and everything seems fine. As of right now, I have a dilemma with my QT. I have the flame angel and mandarin both undergoing a copper treatment for Ich. I put the prescribed amount in, and am waiting. I bought an API copper test kit, but it's essentially useless to fine-tune medication amounts. I know it's between 0.25-0.50, but that's about all I got. I bought a Red-Sea Cu test kit that is good for 0.00-0.40, with resolution down to the 0.05ppm. BUT, it was expired by 7 months so I returned it.
I'm starting to be concerned with my Mandarin. Some days he looks like he's getting fatter. Other days he looks skinnier. I see him eat my frozen mix all the time, including these gigantic bloodworms I'm surprised fit in his mouth. He's never shown signs of ich, and I'm considering moving him into the DT where I know he'll be many times happier. The problem is that he's been in the QT with the Flame (and the ich) for 4 weeks now. I've heard mandarins are resistant to Ich...but how far should I push this? It's probably not worth the risk to my DT, but I'm worried about him in the QT. Are there other things I can do to make sure he's eating enough?