you dont under stand ppl. his tank isnt over stoked and his fish arnt that big, when u see his fish they all seem happy. they dont look sad or depresed or they dont just sit in on corner of the tank. they all swim happily around!!! he saved that blaclk ghost from death. irt was in a tank full of barbs and it was being ripped apart. he bought it and now hes healthyier then probably ur fish.
We understand where your coming from, but you must try understand where we are coming from.
Your friends tank may not be overstocked at the moment but given some time the fish will grow larger and the tank will become overstocked.
We can't stop your friend from going out and buying another fish, but all we want to do is give him the facts before he does something that could create a disaster in the tank.