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.
Excellent point! Ah well, 1/3 aint bad for baseball.