Pond Carbon will remove colors, odors, medications and other impurities from your watergarden. Pond Carbon should be placed in a area of good water flow, this could be inside a skimmer filter, BioFalls®, stream or other area of high water flow. Place pond carbon into carbon mesh bag and rinse under tap water for about 2 minutes or until most of the carbon dust is removed. Pond Carbon should last about a month or two depending on the filtration and fish load. Pond Carbon Carbon Mesh Bag ponddepot@msn.com Copyright - All World Rights Reserved Pond bacteria, Pond Kits and Pondless Waterfall kits, Filter Pads, Underwater Pond Lights. pump replacements and pond algae control. Pond Depot provides excellent technical assistance and fast shipping for all orders. The staff at Pond Depot are highly trained and experienced in installing and maintaining ponds. We will gladly answer any questions that you have. Pond Depot your online pond superstore!