Plantgel (Popularity: )
http://www.plantgel.com/ Absorbent crystal, that absorbs 300-400 times its weight in water, and has a life span of approximately 5 to 7 ...
Water Crystals (Popularity: )
http://www.watercrystals.com Site has water crystals available for online purchase. Water crystals significantly increase the intervals between watering.
Water-Keep (Popularity: )
http://www.water-keep.com Sells polymer crystals for residential and commercial landscaping, xeriscaping, and crafts.