Cheezy - your photos may contain more than one specie of "pondweed".
1) southern naiad / Najas guadalupensis (aka "bushy pondweed" in TX, or "southern waternymph" in other areas)
2) "small pondweed"/"slender pondweed" / both fall under Potamogeton pusillus
3) or #2's close look-alike, "leafy pondweed" / Potamogeton foliosus.
I see opposing leaves in one of the photos (= #1) and alternating leaves in the other photos (= #2 or #3).
As for distinguishing between #2 and #3, look over
THIS LINKAll of this detail is probably splitting hairs from a management-standpoint, except for one key difference.
P. pusillus and P. foliosus are both perennials, while N. guadalupensus is an annual. Dealing with an annual may involve different tactics in comparison to the perennial counterparts.