ive got a lake that is roughly 8 acres,the lake is full of life{fish,frogs,turtles} but i have very little vegetation other than some sort of slimy moss thats on the bottom. would it be alot of trouble to put lily pads in my lake and keep them from taking over? id like to confine them to the west bank and north end,how rapidly will lily pads take over and are they easy to control? or maybe you fellas have some other sort of "floating" vegetation/cover in mind that might be easier for me to tackle? thanks