friend bought them at wal-mart today (ya i know) and when i saw them realized they were a brackwater fish. i have a 10g at home with a gourami in it alone. He said he would take the three spot in exchange for the puffers since he already has some gourami's. Yes i know all the rules. gourami too big for a 10g and all. But he didnt get along with some other fish i had so i had no choice. So anyways, the tank is cycled, he has been in it for 2 months with no illnesses. I read to put 2 tbs of aquarium salt per 5g's. I cleaned the tank twice and did a 50% water change. Do you think they will be ok until tomorrow when i can figure out what to do with the pretty fish. Thank you for any input. Oh, they are about 1-1 1/2" each very small and very brightly colored.