The chemical fertilizer you add to your lawns is alot worse than saltwater. I dump my saltwater right out my front door on my St. Augustine grass. I don't have any dead spots and to most peoples amazement I don't fertilize my grass. And if it wasn't for Aquarist, the reefs in the world would probably be gone already. Although we think Reef fish and Corals are pretty you can't eat them! People have to eat. Fertilizers and Erosion are killing the Reefs. Farming the Reefs to help support small countries will do more to save the worlds Reefs, more than anything else. (Man I am starting to sound like Gary I better stop)