It was the Seasiders' first home win since November 7 and Southern said: "It was a massive three points for us.
"Our home form had taken a dip over the last six or seven weeks so to pull that out of the fire and turn it around like that was unbelievable.
"That's a season defining moment as far as I'm concerned. Hopefully we can push on now and have a real charge again."
Bouazza the hero for Desert Foxes
Algeria's Karim Matmour cancelled out Salomon Kalou's opener before Kader Keita's 89th-minute strike looked to have put the Elephants through.
But substitute Madjid Bougherra rescued Algeria with a last-gasp header to force the contest into extra-time.
And Seasiders star Bouazza emerged the hero when he took advantage of some poor defending to send his side into the semi-finals.
Source: Team Talk
Source: Team Talk