Im picking my dwarf puffer up on thursday, I was thinking about getting two just so they had some company...should I just get a bottom feeder (Id really like to put in a bumblebee goby with him) or would he be happy alone? also @ petsmart they told me to feed him some sort of flakes and everyone has been saying live food....he also told me I needed to put aquarium salt in the water? can someone help me I want his new home to be up and ready