RO systems can remove up to 99% of Nitrates, Phosphates, Heavy metals and water hardness from tap water. All types of fish and aquatic systems benefit from the use of RO water. Not only soft water and delicate species such as Discus, through the reduction of water hardness, Marine fish and inverts through the reduction of Nitrates and heavy metals, but all systems through the reduction of Phosphate and Nitrate levels, the single biggest cause of nuisance algae in any aquatic system. producing area:China payment:T/T, L/C at sight