Prawn's Gone!

Waiting for the tank to cycle is the most 'uggggggggggh' part of setting up an aquarium. So now the shrimp's almost rotted completely and its broken down into bits and much of it has been chowed down the filter. As i said the water is supposed to stink and milk up, but the smell's gone and the water's all clear! Not kinda what i expected, so at this stage it leaves me wondering did the rotting prawn do anything at all.