new puffer not eating and also being very lazy

[ccbrat]

bought my first puffer the other day after getting tired of the ordinary angel fish,guppys,exetra but i also picked up 2 feeder fish as well,so i got the tank set up and relesed them in the tank when it was all ready, about 45 mins anyway the problem is it has been probably about 2 day and i havent seen him eat a damn thing im starting to get worried, and do not want to risk loosing him since i very much love my gsp at first i bought these pellets that i was told they eat but the feeders seemed to enjoy it and my puffer just watched and made no attempt to even see what it is so i also ended up picking up the dried brine shrimp and as far as ive seen still nothing i have heard of blood worms and live food (shrimp type things) but i would like to know why it is he isnt eating he was in a 20 or so gallon tank with 7+ of the gsp so i thought maybe he was ajusting to the fact that he had room, but he still doesnt eat the first day he swam up and down the glass constantly but now he just sits on the filter is there something wrong here? any tips or advice would help alot also he is about 1 inch and was in a freshwater tank so i am waiting to bracish the tank until he seems more comfortable

[leebca]

WELCOME TO REEFLAND!

I'm not sure you found the right place. When you listed 'guppys' I know that there are no 'guppys' in the Ornamental Marine fish hobby.

Is this a marine aquarium or a freshwater aquarium? If it is freshwater, then you will need to find a freshwater aquarium site for your question. This site is for saltwater/marine aquariums.