I definitely setup a brackish aquarium for them. I am also thinking that at the time I'll move them to new location to add another 2. I read this may be the best way to add GSP to a tank since adding them after they establish territory seems very bad idea.
The ordered aquarium is about 100g and I thought it will be fine for them at least until they get bigger. So you think 100g will be okay for them?
Some call it a product of a mis-spent youth, I call it Rock n Roll ! 