Puffer not well?

[Hattie B]

I have a Arthron Mappa that I have had for over 2 weeks now in my main tank.

Everyday he is at the top with my tang begging for food but today is completely different.

He has no interest in food, is very shy hiding/perching on his rock and seems 'listliss'.
I notice nothing strange about him physically (no spots, no fluff, his teeth are good), but his overall attitude is 100% different than yesterday.

The only different thing that I have done was I offered him krill yesterday, which he was biting but not sure if he ate it.

My parameters from about 1/2 hour ago
PH-7.7
Amm-0
nitrites-undetectable

Last water change was last Sunday 30gals.

Maybe I am overacting but I am concerned for my little Henry and this is my first puffer so not sure if it's 'normal' for behavior to change so quickly.
He is a small guy about 4"

Do they decline fast? Or any suspicsious puffer beahvior that I just am unfamilliar with?

Thanks

 

[cloudjockey]

I do not know about your fish, but your pH seems low. Somewhere in the 8.1-8.3 range would be better.

 

[leebca]

You could use help from the PufferQueen! Don't know where she is right now.

I think she says that she always has to de-worm her puffers or does so on a prophylactic basis:

http://www.reefcentral.com/forums/showthread.php?s=&threadid=644238