Gardman 500g Watergel Water Gel Water Retaining Crystals Reduce the need to water your baskets, pots and containers with Watergel, 500g tub FREE POSTAGE £8.95 Quantity: at £8.95 each Add To Basket Reduce the need to water your baskets, pots and containers with Gardman Watergel. The Watergel water storing crystals help retain water in your soil & compost and can reduce watering by up to four times. Easy to use - simply mix the Watergel crystals into the compost or soil and water well before planting your baskets, pots and containers. The Watergel water storing crystals absorb several hundred times their own weight of water. This 500g tub of Watergel is sufficient for 6 x 75 litre bags of compost. One application of Watergel lasts all season. The tub contains two 250g bags of Watergel and a measuring scoop.