You won't be seeing any of the effects for another 5 to 10 years down the road. The mussels will slowly take over any type of lake if can. The mussels need something hard to attach to, so as a soda can, rock or even a shell of the mussel will be able to hold a mussel. They will spread slowly and take over the bottom of a lake. The worst part is that they filter out a ton of plankton from the water witch will dramatically cut down on the insect life in the lakes, ex. Midges and Scuds. Yet some lakes don't have the right calcium and Ph levels to support the mussels.