Originally Posted by Jimlor123
Did you use freshwater or brackish???
Dwarf Puffers are 100% freshwater fish and will suffer in brackish conditions.
A pair of males could have agression issues, depending on the size of tank. It's recommended 2 females per male, 15g minimum, 5g per puffer.
Dwarf Puffers : Home
is a great resource specializing in Dwarf Puffers.