Are my New Butterflies Sick?

[livinlifeinBKK]

Hi all, a few days ago I bought two small butterflyfish for my new FOWLR tank and I'm having trouble getting them to eat anything, despite seeing them picking at rocks. However, today one of them has been staying in the dark cave I made with rocks as if he's trying to avoid the light or maybe he's lethargic and trying to sleep. The other continues to swim around and pick at rocks some. I've looked at them closely and until today I didn't notice any white spots. Now there are a few on each one's tail (but only a few). I think they've both been breathing a little bit heavily since yesterday. I know fish take time to adapt to a new tank and I'm not trying to rush that process, I just want to be sure they aren't sick. I've tried pellet food, fresh clams in the shell, and today I tried Masstick which they were clearly interested in since they both (even the one hiding) swam over to where I put the Masstick but they won't eat it despite being clearly interested. What does this sound like to you guys and how do I treat it?
BTW, the girl in the store said they were pellet trained, I just forgot to ask to see them eat in the store.

 

[livinlifeinBKK]

Species are a yellow butterfly (Chaetodon andamanensis) and I'm not positive but think the other may be an Auriga (colors haven't fully come in yet)
No ammonia or nitrite present and nitrate is about 15.

 

[Steve and his Animals]

A lot of questions need answering before we can make any guesses.

How new is new, as in, how long has the tank been set up and running with livestock in it? How big is the tank? How big are the butterflies and how long have they been in captivity/at the store? Are the white spots uniform and raised slightly, or are they puffy/clumpy on the fins? Are they in a tank you can medicate in?

C. andamanensis I believe is an obligate corallivore, so I don't know how much luck you'll have getting that one to eat/survive even if it does eat.

 

[livinlifeinBKK]

Tank is newly cycled but nitrite levels were also at 0 when fish were added.

Other than a baby clownfish which died before the butterflies came, the butterflies are the first. The clownfish wasn't from a great dealer and I had continued adding ZeoVit Start to help raise the bacteria population and I came to the conclusion that since I dosed more than directed, the bacteria were depleting the water of oxygen. The clown was eating and not showing any ill signs before being found dead in the morning.

30 Gallon- I know that's small but these are baby butterflies I'd say an inch and a half long that I plan on building a bigger tank for...I got a really good deal on them so bought them early.

It's hard to tell since the white spots are so small and sparse right now.

Yes, I can medicate in it since it's a FOWLR...it's only the two little butterflies and live rock and sand.

Again, I know that they need to get used to the tank but some of these symptoms aren't normal such as avoiding light and being very interested in the Masstick but not wanting to take a bite.

 

[livinlifeinBKK]

A lot of questions need answering before we can make any guesses.

How new is new, as in, how long has the tank been set up and running with livestock in it? How big is the tank? How big are the butterflies and how long have they been in captivity/at the store? Are the white spots uniform and raised slightly, or are they puffy/clumpy on the fins? Are they in a tank you can medicate in?

C. andamanensis I believe is an obligate corallivore, so I don't know how much luck you'll have getting that one to eat/survive even if it does eat.

Sorry, meant to post that as a reply so you'd be notified.