Check the listing for details. 5 LBS Medium Water Polymer Crystals Free Shipping USPS or FedEx Express Saver. Condition: New. Listed at 38.97 USD. Free Shipping USPS or FedEx Express Saver Available in check out . Order must be entered by 12:00pm est.-Can't be used on all order depending on the size of the order. We will refund you During the Winter months we will only be shipping Monday thru Thursday Medium Sized (1-2mm) Water Absorbing Polymer Crystals. These crystals are commonly used in Arts & Crafts, soil moisture management, and for providing safe hydration to feeder insects. Water Absorbing Polymer Crystals absorbs over 400 times their weight in water. With 1oz of water crystals you can make a whole gallon of water or use 1 teaspoon added to 8 oz of water. · Use 1 oz of Water Polymer Crystals by weight for each gallon of water. · Allow to saturate for at least 1 hour. · Strain off excess water before use. For smaller quantities use 1 teaspoon per 8oz of water