i'm UTG with AQ, i raise to 4BB, folds back to the BB, who calls, He is a fish.

flop is Axx, flush draw.
I've just seen the fish call huge bets on a flush draw so i think i can make him pay here. I bet pot, he calls.

Turn doesnt bring flush so i'm still confident. I think he has either the draw or Aweak kicker. He bets min. $0.50, into $8, i raise AI.

my reasoning was this, if i bet the pot that leaves me with a pretty small stack if he calls, and i'd most likely call the remainder if the flush card hits anyway. He's a fish, so if he is chasing the flush then i think he'll pay the whole lot. also i think he'll pay me on A weak kicker so i go for it.

what you think of this? A wise move?

and whats with that 50c bet? does that mean something from the average fish, or are they just completely random?