OlderBro: be aware that some of the referenced plants and many plant species available for sale on various websites are prohibited by TP&W.
http://www.tpwd.state.tx.us/fish/infish/regulate/exotics.htm Even some of the listed non-prohibited species account for many pond owner complaints in Texas due to our state's lengthy growing season and comparatively mild winters. Generally speaking, tactics that work in one part of the country (or in backyard ornamental ponds) may not work equally well elsewhere or in larger waterbodies. Differing climates, water qualities and pond designs play a huge role in an effective overall management plan.
In respect to your 1/3rd-acre pond, I'd agree that you need to focus on nutrient management (reduction & prevention).
Non-invasive aquatic macrophytes (plants) are certainly an option for accomplishing this objective. But, be careful about the specie(s) that you select. Don't adopt any species that may quickly become a problem in and of themselves.
There are also several microbial agents that are marketed on the concept of impacting nutrient-availability, with the objective of reducing available "fuel" for algae growth. However, these microbial products vary widely in their make-up and cost-effectiveness.
I'd be happy to email some information to you regarding microbial agents, if desired. Call or email me if you're interested. KD
