thats what i was thinking of doing, but i didnt know they need full salt when full grown, im trying to get a 30g and that is what he would go into once i get it set up, should be 2 months or so at the most. considering at the store they live in not much bigger tanks for 20 of them i think he would be ok in a 10g hex for a couple months by himself.the green spotted puffer would be ok in the 10 until he starts getting bigger. then you should upgrade to atleast a 29 gallon and make that brackish, and then once he's full grown upgrade to around a 40 breeder and make it saltwater.
thats what i was thinking of doing, but i didnt know they need full salt when full grown, im trying to get a 30g and that is what he would go into once i get it set up, should be 2 months or so at the most. considering at the store they live in not much bigger tanks for 20 of them i think he would be ok in a 10g hex for a couple months by himself.