For some reason, being a puffer specialist, I never have any luck with Dwarf puffers. PetSmart always gets FAT ones in, and I get excited and buy them all up.. Of course I set a new tank up for them and they are doing great for a few days.. But unfortunetly these mini-monsters have a special required diet that I usually do not have enough time to fulfill, nor do I have enough time to change the water in their tank.. I finally taught myself to quit buying them, no matter the temptation, because I do not have enough time on my hands to properly care for them as well as the fish down at the shop..