Neptunes Harvest 12 lbs Orange Label Pail Crab Shell Fertilizer - Pack of 4 Neptunes Harvest Organic Crab Shell is an excellent dry organic source of nutrients including Calcium and Magnesium. It retains moisture in the soil and builds the organic matter. It also gives the roots something to grab onto and wrap around for a food source creating a deeper root system. Crab Shell is high in Chitin which promotes the growth of Chitin eating bacteria in the soil. It will help eliminate Ants Grubs Fungus and Root Nematodes because they are all Chitin based in structure. Put around plants Crab Shell will keep Slugs and snails off. It also helps choke out weeds and keep moles voles mice from digging up bulbs and root vegetables. Features Orange Label Crab Shell Pail Specifications Capacity: 12 lbs