Sodium Polyacrylate

When mixed or tilled into soil, water Crystals will absorb and retain excess water for a period lot longer than untreated soil is capable of doing. The extent of time depends on ambient temperature, humidity and the thirst of the plant(s) the soil feeds. The water is extracted through the roots of the plants as the plant is growing. If you squeeze a hydrated crystal, the polymer won't leak moisture as does a sponge. Instead, the hydrated polymer gel will break into smaller pieces or crystals. A water crystal will dehydrate back to granules smaller than their original size, but replenish as full as its maximum