These are a great fish and a personal favourite (probably being one of the cool natives we can keep here).
They do better in brackish in my experience but will tolerate fresh. I also found they did better with a friend or two of their own species aswell.
Will spit for food really easily with some coaxing which can be as simple as sticking some blood worm against the side of the glass just above the water line. They may just jump for it at first (they love to jump for food too) but eventually you will get them spitting. At least this is the method that worked for me.
After that i setup some 'tight ropes' across the top of the tank and used to put crickets/roaches on them and watch them get knocked off.
Oh they can get to a reasonable size too, very very cool fish indeed.
Nice score!