Actually my solandri puffer loved to munch on algae sheet (although he still preferred meaty food). I tried to include greenery as much as 50% of its diet. This is really important for their proper growth and coloration. I used to feed him live ghost shrimp from time to time, but definitely not necessary. When you feed your puffer frozen shrimp, make sure leave some exoskeleton part attached to the flesh part so that this will help file down its ever growing teeth!