Ok I get it. Not exactly the same situation, but I've got a dirted shrimp tank with a population of some sort of aquatic worms (I suspect black worms but it's hard to tell) and they act like earthworms, they eat the dirt below the sand cap then poop it out above it. And I have to clean out my prefilter about every 3-4 days because it clogs so fast with the very fine silty dirt that gets up into the water column. I had some cories in this tank at one point and they kicked up so much of the stuff you couldn't ever see more than an inch into the tank. So the thought of deliberately adding something along the sames lines makes me wince a bit.
If you do this you're going to have a lot of mess, and like some other people said I'd expect a big algae bloom along with very murky water.