A chess clock won't work. Its too complicated, unless the tv crew keeps time. The players will mess it up.
Yes, I'm speaking from experience. I played with a chess clock before. Trust me, pool players are not smart enough to hit the button at the end of each of their innings.
Yeah but doesn't the same issue come up with a normal clock?
Either some third party has to hit a button after every turn (regular or chess clock).
Or the players themselves have to hit the button (regular or chess clock).
As far as I can tell, neither is more difficult than the other.