Anyone ever use co-polymer gel (a.k.a soil moist) crystals to aid in water retention? I'm wondering how well these would work with hydroseeding and/or aeration/overseeding. From what I understand they can hold up to 400 times their weight in water, and have the possiblity of lasting up to 10 years in the soil as long as they are buried (they will break down in the presence of UV light). The product makers suggest 10 lbs. per acre with hydroseeding. Anyone ever try it?