50NL Pocket 99's on CO.....correct line? What to bet on turn?

[flytrap]

I would just call on the flop. Giving free cards in NL isn't as much of a concern as protecting your stack. Keep the pot small, as his chances of hitting a 6-outer isn't that good, and if he hits, you won't give him action anyway. If you have a big but vulnerable hand, then worry about free cards. That being said, callt he flop, fold if he bets the turn but bet if checked to.