my friend is about to buy a tank l=46 h=42 w=23.. not sure how many gallons. but its tall and not long so what kind of fish could he stock in here? he prefers "aggressive fish eating fish"
lot of volume but not enough length for a lot of predatory fish, I would go for a single species tank with either a hoplias malabaricus or a fahaka puffer.
I would say they both fit the bill of "aggressive fish eating fish" !!
my friend is about to buy a tank l=46 h=42 w=23.. not sure how many gallons. but its tall and not long so what kind of fish could he stock in here? he prefers "aggressive fish eating fish"