i brought back my green spotted puffer cuz people on here said it needed to be in bracksh than salt. and 2 guys at different pet stores said they have always done fine in freshwater. now i just read that figure eight puffers can live their lives in only freshwater. any feedback?
Figures Eights need brackish water just like the Green Spotted Puffers.
Puffers do well in species only tanks. If you really want puffers, pick which tank you want them in, the 15 or 29 and then you will have to decide what kind of fish you want in the other tank. You could put 3 dwarf puffers in the 15, which I think would work out best and be a lot less stressful than trying to put tankmates with them.
Keeping a brackish tank really isn't that difficult and you could put one F8 in the 15 if you really want one.