I don't see how you get any more money of "the isolater" unless he's a donkey.
That said, he might be married to AA or KK here on such a dry board.
If you're happy taking the pot as is, go ahead and push, no way he isolater has 99 here, although short stack could. If you think you can string this guy along, bet 1/3-1/2 on turn and same on river provided no real scare cards (mostly A or K) hit.
Very read dependent.