Jack Redshaw's second-half strike failed to prevent Blackpool slipping back to the bottom of the Sky Bet League One table after a 1-1 draw at home to Barnsley.Conor Hourihane's second goal in as many games for the Tykes was cancelled out by Redshaw 10 minutes after half-time, but Crewe's victory at Shrewsbury saw the Seasiders plummet to the table's basement on goal difference.Barnsley started brightly and took the lead in the seventh minute. Marley Watkins went on a mazy run down the right before crossing to Hourihane, who scuffed a right-footed shot into the bottom corner from six yards.Blackpool missed a great chance to equalise four minutes later as Henry Cameron struck wide from six yards. Yet Neil McDonald's side did draw level on 55 minutes.A slick move resulted in Redshaw being slipped clean through by Brad Potts and driving low into the far corner.The Seasiders almost scored a winner through Lloyd Jones but the centre-back missed his header from close range before goalkeeper Colin Doyle had to acrobatically deny Hourihane.