What is the water cure? Why would I want to do it?
Water curing uses osmosis to flush out the chemicals, chlorophyll pesticides, pests, and anything else you would rather not be smoking. The water cure is very fast (about 7 days) with optimal quality (as compared to 30 days air curing), and as well does not stink like an air cure does. Water-cured buds are also more potent than air-cured (however there is proportional weight loss to potency increase).
THC is not water soluble and the bud is protected from air/light, enabling potency to be maintained at it's highest levels, while the nasty chemicals are flushed out. Some growers report being able to add nutes all the way up to their harvest date because the water cure takes care of the built up chemicals.
Because of its speed, stealth and clean taste, water cure is very inviting to most non-commercial growers. The commercial grower might not be attracted to the water cure, as the weight of the bud is diminished.