It takes quite a few plants to drastically reduce water changes. Just so you know. Also, just a heads up that goldies are often big plant eaters. Many goldie keeps use silk plants instead of real because of this. Though, you can certainly try it out with some hardy, tough plants and see how it goes.
What kind of setup do you have for keeping things out of the water? What are you interested in growing? I am not big into the technical side of this, but I know other people will be very willing to help out too. I have done setups with pothos, peace lily and bamboo. So, I can try to help out some until others can chime in a bit more.