My opinion.
Curlyleaf pond weed
American pond weed
Milfoil

Milfoil will be rooted to the bottom of the pond, coontail won't. Too me it looks like you have a long bare portion of stem without leaves that likely runs to the bottom where it is probably rooted. The leaf stems also look paired rather circular.

Last edited by Shorty; 06/11/16 03:50 PM.