Howdy James!
What part of Rowlett are you in? I'm near Dalrock and 66 (Actually closer to Chiesa/66).
As far as getting rid of green algae, is it the hairy kind?
If so, manual removal and a good clean up crew are your best first line of defense. (Clean up crew - snails and maybe hermit crabs, sea-hare if a really bad infestation, etc)
Also, monitoring your water quality is paramount. Use only RO/DI water for water changes and top off. Increase water changes to bring nutrient load of the water down, etc.
Do you currently test for things like Nitrates and Phosphates?
If you don't, if you're near me I could at least test your nitrate level for ya'...
Oh, and I'm a big fan of intentionally cultivating higher algae (Calueperas, Gracillarias and Cheatomorph) in a seperate refuguim tank to help out-compete the nuisance algaes...