Free delivery on orders over £50.00 in the UK Online Catalogue : Products For Tropical Fish : Aquarium Filtration Media : Cleanwater Cleanwater Filter Resin A resin pouch to place in aquarium or filter helps to reduce nitrate, phosphate and algae last upto 3 months. For use in fresh and saltwater aquariums. A50 Cleanwater - for tanks upto 40 gallons - £4.37 A100 Cleanwater - for tanks upto 80 gallons - £7.84 Can't find what you're looking for ? email us - sales@fishybits.co.uk