Oase DechlorinatorThe Oase Dechlorinator is ideal for either new pond setups or well established koi ponds when you want to add fresh tap water. It will ensure your tap water is free of chlorine, chloramine and heavy metals making the water totally safe for your fish. Its simple to install with standard hose connectors (supplied) so there is no need for bucketing tap water and adding liquid dechlornator which can be sometimes time consuming. You can simply hook it up