$25NL When to slow down with flush

[Emmitt2222]

Villian is very loose and slightly aggro postflop. When do I slow down here? I'm thinking going all in on the turn may not have been right, but I was thinking he maybe had a big heart or straight, so I dont know.

Party Poker No-Limit Hold'em, $ BB (5 handed) FTR converter on zerodivide.cx

Hero ($29.15)
SB ($32.36)
BB ($23.12)
UTG ($25.80)
MP ($4.82)

Preflop: Hero is Button with 6[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $0.10.
UTG calls $0.25, <font color="#666666">1 fold</font>, Hero calls $0.25, SB (poster) completes, BB checks.

Flop: ($1) 8[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets $0.25</font>, BB folds, UTG calls $0.25, Hero calls $0.25.

Turn: ($1.75) 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets $0.25</font>, UTG calls $0.25, <font color="#CC3333">Hero raises to $2.5</font>, <font color="#CC3333">SB raises to $4.75</font>, UTG folds, <font color="#CC3333">Hero raises to $12</font>, <font color="#CC3333">SB raises to $19.25</font>, Hero goes all-in, SB calls $9.40.

River: ($42.65) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>

Final Pot: $42.65