Tilapia forage on filamentous algae, not pondweed. These types of pondweed are considered beneficial and are far more valuable to a pond ecosystem and beneficial to your fishery than alternate forms of invasive vegetation or FA. Unless it's taking over your pond, light/moderate management is typically the only thing needed. If that group of pondweed in photo is bothering you, a rake can make quick work of it.

Many men go fishing all of their lives without knowing that it is not fish they are after. ~ Henry David Thoreau

[Linked Image from i1261.photobucket.com]