 than what you have right now. That is the easiest way to stop any kind of mold, mildew, algae, lichen growing on that deck surface. Then the other thing that you could do is you can use a product called Spray and Forget. Now what Spray and Forget does is it reacts with the sunlight to also kill whatever growth is on that deck, but it doesn't happen instantly. So I would put it on as the last step because if you have a heavy coat right now, you're going to wait all summer for it to