I thought I would give an update to anybody who may have the moldy carpet syndrome. I saw a tip in the local paper to use baking soda on your roof to kill the moss. I decided to try that on the pool deck back in April as it started to green up. Since the pool was covered I went heavy on the baking soda. I used about 2 1lb boxes per 5 x 8 section of decking and brushed it in to the carpet fibers. It was white looking when done. I went back to the pool after about three weeks and to my surprise it was all dead and in a state of crumble (the moss). I went back to the covered pool last week and did a second dose - this time a 1lb box per deck section and rubbed it in with a brush. I will be opening the pool in a couple of weeks and figure would do it as a prevention.