Water Filter Outdoor Media A) Anthracite - Anthracite is an excellent filter media for water clarification in drinking or industrial use, when used in combination with filtering sands. It is one of the most used filtering media. It is a good complement for the mixed filters, in company of sand or zeolite. B) HAYCARB 20 x 40 Coconut Shell Activated Carbon 5kg/pack (NSF Certified) - G.A.C is a proven option to remove certain chemicals, particularly organic chemicals, from water. GAC also can be used to remove chemicals that give objectionable odors or tastes to water such as hydrogen sulfide (rotten eggs odor) or chlorine. For a 942 FRP outdoor filter : Layer 1: 10kg of Coarse Sand Layer 2: 10kg of M sand Layer 3: 20kg of Fine Sand Optional Layer 4: 5kg of Zeolite or Anthracite or Activated Carbon Please order max 2 bags per time due to the weight restriction. ** order received after 1pm will process the next day (or the next business day on Saturday, Sunday & Public Holiday) Thank you.