TPTK, question on river

[11t]

Just sat down so no reads. Did I play this hard enough or was my betting sound? What is the standard river play here?

PokerStars No-Limit Hold'em, $0.25 BB (4 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Button ($30.25)
Hero ($25.50)
BB ($6.10)
UTG ($9.65)

Preflop: Hero is SB with A/images/graemlins/heart.gif, J/images/graemlins/spade.gif.
<font color="#666666">1 fold</font>, Button calls $0.25, <font color="#CC3333">Hero raises to $1.5</font>, <font color="#666666">1 fold</font>, Button calls $1.25.

Flop: ($3.25) J/images/graemlins/club.gif, 5/images/graemlins/heart.gif, 6/images/graemlins/spade.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $2</font>, Button calls $2.

Turn: ($7.25) 8/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4</font>, Button calls $4.

River: ($15.25) 7/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
Hero...

[Macquarie]

River card is looks terrible for you, but that said it's hard to put him on the draw here - I'd block the river for $6.

Turn bet is a little small - I bet $6 there.

[orange]

I block this river. $7-$8 sounds good.