i was informed that you can use a peace lily in a gf tank. Any thoughs on this?

I wouldnt recommend any terrestrial plant in a tank. It will just slowly rot and contaminate the water. A lot of times pet stores will sell plants like that saying they work in a tank. They may look great for awhile but then they'll die. Also Im not sure which ones might be poisonous. So just to be safe research any plant before putting it in your tank. In general if it has really thick, shiny waxy leaves, its not meant to go in your tank.