Lots of great advice above. Water under 50cm deep, prawns present, and a consistent non stop retrieve with a clear stick bait like the Bassday sugapen 70, lucky craft sammy, or Jackson Panic. The consistent retrieve without stops is critical for whiting. I heard a whiting guru describe the retrieve as little twitches of the rod tip at a rate of 2 per second, while slowly winding the reel just. Fast enough to maintain forward uninterrupted motion. I have not caught many whiting but I have caught a lot of other things doing this!