is Tetraodon fluviatilis a fresh water or a brakish water puffer

[puffer8899]

i have two Tetraodon fluviatilis inwith my Tetraodon nigroviridis
its a light to medium brakish tank 20gal long now im moving the two Tetraodon nigroviridis to a 55 in a month or two but i don't know if the Tetraodon fluviatilis will be able to take the full brakish water

ps is a 55 big enough for two archer fish

 

[ChilDawg]

Both are BW puffers.

I don't think that the 55 will fit two Archers.

 

[Pufferpunk]

Archer fish grow to be a foot long. I have 2 (5") T nigroviridis (GSP) in a 50g tank w/a (3") T fluviatilis (Ceylon), in SW (1.019), along with 3 damsals.

Check out my tank at the previous post: My Webpage.