http://www.boxlotfish.com/product_info.php?products_id=1491

The species from that link are the P. paludosus species. They may actually take hold in your pond Aaron with you have a warmer climate. I suspect the scuds would possibly take hold in northern climates. Bill Cody has said he's tried to get two different species of them to take hold in his pond without luck. I am sure the fish will suck them down like candy when they are initially stocked though...