Using freeze dried food isn't a good idea , Using dry freeze dried foods can cause health issues and can lead to death, much like feeding uncooked rice to birds.
I would feed them frozen bloodworms as a staple diet. Mine currently dont eat frozen so eat live bloodworms, im training them to eat frozen bloodworms as many do.
Also brine shrimp are not a good diet for dwarf puffers , they dont have the correct nutrients in turn this will shorten their life.
Sorry for rambling on!
I wanna see picys !
Im not sure.if I have the same puffers but I know they are small and dwarf. I didn't realize they didn't eat algae wafers. They do eat my snails, so hopefully they wont starve. My snail population is very little thanks to these guys.