Can't access a floating water lily tuber, will it attach by itself

I did a stupid thing: there is a big 3 acre-ish pond by my house.
Yesterday I went to Lowes and got 3 water lilies, tied them each to a
big stone and tossed the 3 packages into the pond hoping they will
grow. But the lily broke away from the confinement and float up in
the middle of the pond. The pond's bottom is filled with muck and I
can't risk my life retreating the lily. Now I think I joepardize the
lilies'life.

Will these lilies still have a chance to attach themselves? They are
healthy ones already with 6'' of leaves on them and root development
and huge tubers. The pond has about 12-15'' water between surface and
top of the muck. The depth of the muck is unknow as I tried to stick
my leg into it while attempting to access the floating lilies, and it
swallowed my entire leg. I can't even feel a sold bottom. The pond
has very calm water - fed by a stream with an overflow on the other
side. It only gets water movement when it rains.

Guess I have to put on my swimsuit to rescue the lilies. But will
they attach themselves if the water won't carry them away? Thanks for
advice.