Cleaning and Stain Removal - Pool Carpet Mold

I have an inground pool which I just replaced the liner of this fall. I live in the Boston area. The decking around the pool was 1 inch patio blocks which I covered with carpet almost 20 years ago. About 5-7 years ago I covered that carpet with another carpet. Both are indoor/outdoor. I am now getting a great deal of bright green mold on the carpet and am looking for ideas as to how to get rid of it without staining the carpet(as in bleach). If I must I will rip up both layers and start again but I would like to avoid that if possible. Any ideas?

Old carpet should have been removed before installing new carpet. Mold and mildew spores are everywhere. When they find a damp, soiled, dark and poorly ventilated area, they tend to settle in. Any moisture trapped between carpet will grow mold & mildew. An enzyme digester cleaner can be used for mold and mildew. Either spray on or use a carpet steam cleaner. The trick is to give enzymes time to work. Repeat applications may be necessary. Or, treat carpet with anti-microbial liquid to disinfect. Keeping carpet clean and disinfected will keep mildew at bay and help prevent allergies and fungal infections of the feet.

I would pull up both layers of carpet...toss the old one. Leave the other one laid out in a garage or somewhere to dry for a few days. IF this carpet was supposed to be used for around pools....it is more than likely olefin (polypropeline) sp? If it is...which it should be. It would not absorb water...but if you stacked 2 layers...that would make sense why the problem started..the water couldnt drain away. A mild bleach solution would not hurt olefin. Olefin is basicly plastic..thats why its good for around pools..will not hold onto water and stain resistant against the chlorine in the pools. You can either check with the place that you got the carpet to make sure its olefin or cut off a piece of the fiber and take a glass of pool water and put it in. Push the fiber to the bottom and pinch the air out in between you fingers. If it comes back up and floats its olefin. If not it would be some weird blend of material. If its not bleached out right now...thats also a good indicator. test any diy cleaning in a hidden or small area. You may be able to spray down a mild bleach solution in a pump up sprayer....let sit-10-15 mins then scrub with a broom and rinse off. Of course up in Boston kinda hard to find a good day this time of year