So I'm considering new things for my 75 gallon which is currently housing a 9" green terror. Wanting a wet pet and I've heard many good things about puffers. My question is, are there any freshwater puffers (don't want to deal with brackish water just yet) that would do well solo in a 75 gallon? I have 0 experience with these so y'all will have to be specific. Thanks in advance for y'all's responses!