I'ed like to introduce " DRI-Z-AIR '. We're using it in our greenhouse to remove excess moisture and fight MP. Dri-z-air people sale a container to use, but you can make your own easy. You'll need a screen tight enough to hold the drri-z-air ''crystals'' and bowl to hold water. Just form a cup to the screen to hold the ''crystals'', poor them in and they go to work picking up moisture. I have at least 12 of them working in our GH. Do not let them spill on plant soil!!! They've been working real well,but the real test is the next 10 days of rainy type of weather for the west coast. Green blessings.